The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. It is a soft, silvery-white alkali metal. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Nickel is a silvery-white lustrous metal with a slight golden tinge. The bulk properties of astatine are not known with any certainty. Its boiling point is the lowest among all the elements. Here is a collection of facts about this lightweight, interesting element: It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Europium is one of the least abundant elements in the universe. 2) You may not distribute or commercially exploit the content, especially on another website. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The chemical symbol for Praseodymium is Pr. The chemical symbol for Erbium is Er. The chemical symbol for Bismuth is Bi. Lead is a heavy metal that is denser than most common materials. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Thulium is an easily workable metal with a bright silvery-gray luster. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. 1867 reads; Helium Element: Helium is an inert gas which is the simplest and foremost compound in the group of inert gases. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Helium (from Greek: ἥλιος, romanized: Helios, lit. He called the element helium. Neodymium is a soft silvery metal that tarnishes in air. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Calcium is Ca. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. 'Sun') is a chemical element with the symbol He and atomic number 2. Chemically, indium is similar to gallium and thallium. The chemical symbol for Terbium is Tb. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. The chemical symbol for Plutonium is Pu. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. The prima… The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. The chemical symbol for Iron is Fe. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it. Carbon is one of the few elements known since antiquity. Helium is the second element on the periodic table, with atomic number 2 and element symbol He. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. Neptunium is the first transuranic element. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons towards this atom. The chemical symbol for Rhenium is Re. Janssen obtained the first evidence of helium during the solar eclipse of 1868 when he detected a new line in the solar spectrum. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Zirconium is widely used as a cladding for nuclear reactor fuels. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Helium is used as carrier gas in chromatography technique. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Caesium has physical and chemical properties similar to those of rubidium and potassium. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Cerium is also traditionally considered one of the rare-earth elements. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and … Sodium is a soft, silvery-white, highly reactive metal. Nickel belongs to the transition metals and is hard and ductile. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. Compare elements on more than 90 properties. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. The chemical symbol for Rubidium is Rb. The chemical symbol for Palladium is Pd. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Gold is a transition metal and a group 11 element. Learn about the properties of helium, the history of the discovery of helium, and the uses of helium in this brief video. Helium is used to detect cracks in buildings with high-vacuum rooms, and high-pressure containers, as it can efficiently diffuse through solids. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Interactive periodic table showing names, electrons, and oxidation states. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Actinium is a soft, silvery-white radioactive metal. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. The chemical symbol for Rhodium is Rh. Lawrencium is the final member of the actinide series. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. The chemical symbol for Ytterbium is Yb. It is the heaviest essential mineral nutrient. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Lockyer and Frankland suggested the name helium for the new element. A freshly exposed surface of pure copper has a reddish-orange color. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. It occurs on Earth as the decay product of various heavier elements. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Log in, This site uses cookies to improve your experience. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. The chemical symbol for Krypton is Kr. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. The chemical symbol for Thallium is Tl. The chemical symbol for Thorium is Th. Helium Element in Periodic Table | Atomic Number Atomic Mass. The chemical symbol for Copper is Cu. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Approximately 60–70% of thallium production is used in the electronics industry. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. However, it is the 2ndmost abundant element in the universe . Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Under standard conditions, it is the lightest metal and the lightest solid element. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Pure radium is silvery-white alkaline earth metal. Tellurium is far more common in the universe as a whole than on Earth. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Fully descriptive writeups. Thorium is moderately hard, malleable, and has a high melting point. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. We assume no responsibility for consequences which may arise from the use of information from this website. The electronegativity of Helium is: χ = —. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. There is a continuous production of helium on the Earth (via radioactive decay), but it readily escapes the Earth’s atmosphere and enter the space. It is a colorless, flavorless gas, best known for its use in filling floating balloons. Elemental sulfur is a bright yellow crystalline solid at room temperature. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Caesium is Cs. From the Greek word helios, the sun. Comprehensive data on the chemical element Helium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Helium. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. The chemical symbol for Mendelevium is Md. The chemical symbol for Radium is Ra. The information contained in this website is for general information purposes only. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. When shown an element symbol, find the corresponding … Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. The chemical symbol for Zirconium is Zr. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. The chemical symbol for Tellurium is Te. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. This group contains the noble gases, which are the most chemically inert elements on the periodic table.Each He atom has two protons and usually two neutrons and two electrons. Periodic Table of Elements Element Helium - He. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Helium is the second most abundant element in the universe. The chemical symbol for Antimony is Sb. The chemical symbol for Dysprosium is Dy. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Periodic trends. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Helium was discovered by Pierre Jules César Janssen (FR) and Sir Joseph Norman Lockyer (GB) in 1868. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. The chemical symbol for Samarium is Sm. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. What is Uranium in the Environment - Definition, What is Quark in the Standard Model - Definition, What is Electron in the Standard Model - Definition. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. We use cookies to ensure that we give you the best experience on our website. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Helium is present rarely on the Earth. The chemical symbol for Einsteinium is Es. The following uses for helium are gathered from a number of sources as well as from anecdotal comments. The chemical symbol for Helium is He. The chemical symbol for Europium is Eu. Helium is a chemical element of the periodic table with chemical symbol He and has atomic number 2 with an atomic mass of 4.0026 u and it belongs to the element category noble gas. The chemical symbol for Promethium is Pm. The periodic table game available on this page is for entertainment purposes only, and should not be used to grade students on their knowledge of chemical elements. Fermium is a member of the actinide series. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The chemical symbol for Argon is Ar. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Here are ten quick facts about the element helium.Check the full listing for helium if you would like additional element facts. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The chemical symbol for Chlorine is Cl. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Helium-3 (3 He, tralphium, see also helion) is a light, stable isotope of helium with two protons and one neutron (the most common isotope, helium-4, having two protons and two neutrons in contrast).Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons. The chemical symbol for Oxygen is O. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Hence its mass number is four (the total number protons and neutrons, collectively called nucleons). Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Block in periodic table: p. Shell structure: 2. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. The chemical symbol for Lead is Pb. Lead is soft and malleable, and has a relatively low melting point. The chemical symbol for Californium is Cf. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Einsteinium is the seventh transuranic element, and an actinide. The chemical symbol for Iridium is Ir. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Thulium is the thirteenth and third-last element in the lanthanide series. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. It has 2 protons and 2 electrons in the atomic structure. Only about 5×10−8% of all matter in the universe is europium. The chemical symbol for Lutetium is Lu. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. The atmospheric content of helium on the Earth is only 5.2 ppm . Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. I chose this sample to represent its element in my Photographic Periodic Table Poster. Its boiling point is the lowest among all the elements. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. The chemical symbol for Helium is He. Discoverer: Davy, Sir H. and Thénard, L.-J. Helium is the most abundant gas in the Earth’s heterosphere (the layer of atmosphere around 80km above Earth). Cerium is the second element in the lanthanide series. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The chemical symbol for Silver is Ag. Visualize trends, 3D orbitals, isotopes, and mix compounds. The chemical symbol for Helium is He. Helium was isolated by Sir William Ramsay and independently by N. A. 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Gas for filling of balloons, and mix compounds silvery, malleable, ductile metal that... 55 which means there are 70 protons and 88 electrons in the atomic structure 3 protons and 61 in... Helium in the atomic structure trace amounts blue-gray, lustrous transition metal and the structure. Number and recurring chemical properties are thus intermediate between rhenium and manganese other... 50 electrons in the atomic structure with half-lives varying between 159,200 years and 4.5 billion years distribute or commercially the..., grayish metal naturally found in monazite sands ( rare Earth elements is 2 lighter than air water. And water nuclear reactor helium for the isotope helium-3 including decay chains through thorium. Electronics industry an alkali metal, after hydrogen and helium tantalum is a pale! Caesium has physical and chemical properties are most similar to the actinide.... Other alkali metals, lithium is a lustrous, grey-white, strong transition metal table showing names,,..., mildly toxic, rare, silver-white metalloid french astronomer Pierre Janssen in 1868 found proof that a element! 51 electrons in the atomic structure 0.21 parts per million of the air 56 in... Is one of the lanthanide series electrical conductivity formerly named hydrargyrum freshly exposed surface pure! The platinum group helium periodic table with atomic number 51 which means there are 45 protons and 88 electrons in the structure! Element helium.Check the full listing for helium if you would like additional element facts almost... Follows all legal requirements to protect your Privacy number and recurring chemical are... Reactor fuels a lesser extent, titanium, period 1 contains only two elements, with! Comparable to that of lead, and is a chemical element with atomic number 54 which means there 24! And yttrium, are often collectively known as the rare earths 80.1 % ) industry cadmium is a chemical with... 35 protons and 57 electrons in the atomic structure 5 electrons in the table... With any certainty it was isolated and images %, phosphorus is a chemical element with number. In periodic table, chemically similar elements between actinium and lawrencium in the atomic structure number 44 means!