It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. 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. Caesium has physical and chemical properties similar to those of rubidium and potassium. It is occasionally found in native form as elemental crystals. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Helium is a chemical element with the symbol He and atomic number 2.It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Visualize trends, 3D orbitals, isotopes, and mix compounds. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. The chemical symbol for Gold is Au. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Hence its mass number is four (the total number protons and neutrons, collectively called nucleons). It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Compare Helium and Carbon. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Tin is a post-transition metal in group 14 of the periodic table. Its boiling point is the lowest among all the elements. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Actinium is a soft, silvery-white radioactive metal. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. 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). E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The chemical symbol for Neon is Ne. Nickel is a silvery-white lustrous metal with a slight golden tinge. It is a colorless, flavorless gas, best known for its use in filling floating balloons. The chemical symbol for Helium is He. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. Uranium has the highest atomic weight of the primordially occurring elements. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Helium-3 was discovered in 1939. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Period in periodic table: 1. 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. It's the lightest noble gas. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. It is even less abundant than the so-called rare earths. Our Website follows all legal requirements to protect your privacy. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Helium is a 2. chemical element in the periodic table of elements. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Its boiling point is the lowest among all the elements. We assume no responsibility for consequences which may arise from the use of information from this website. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. The chemical symbol for Polonium is Po. 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. Common chemical compounds are also provided for many elements. 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. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. 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. Platinum is one of the least reactive metals. Its boiling point is the lowest among all the elements. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. The chemical symbol for Gadolinium is Gd. The chemical symbol for Xenon is Xe. Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons towards this atom. The chemical symbol for Tantalum is Ta. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. 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. The chemical symbol for Selenium is Se. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. For this purposes, a dimensionless quantity the Pauling scale, symbol χ, is the most commonly used. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 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. The chemical symbol for Rhenium is Re. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. 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. The chemical symbol for Rubidium is Rb. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Block in periodic table: p. Shell structure: 2. Zirconium is widely used as a cladding for nuclear reactor fuels. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. The name samarium is after the mineral samarskite from which it was isolated. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. 2: Helium - Helium [He] Group: 18 Period: 1 Atomic number: 2 Atomic mass: 4.002602 Configuration: 1s 2 Atomic radius: 31 pm Covalent radius: 28 pm Electron affinity: 0 eV Ionization energy: 24.5874 eV Electronic term: 1 S 0 Mass fraction in the earth crust: 0.0000000055 The chemical symbol for Francium is Fr. If you continue to use this site we will assume that you are happy with it. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Thallium is a soft gray post-transition metal is not found free in nature. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Here is a collection of facts about this lightweight, interesting element: The chemical symbol for Arsenic is As. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. The chemical symbol for Helium is He. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Periodic trends. Only about 5×10−8% of all matter in the universe is europium. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Group name: Noble gas. The chemical symbol for Indium is In. Its boiling point is the lowest among all the elements. The chemical symbol for Thallium is Tl. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Helium is atomic number 2 on the periodic table, with the element symbol He. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. The chemical symbol for Platinum is Pt. The chemical symbol for Nobelium is No. It is a noble metal and a member of the platinum group. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. In our large periodic table displays we use larger versions of these tubes: The ones photographed here are about 3" tall, but the other ones look basically identical, just bigger. The chemical symbol for Antimony is Sb. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. The chemical symbol for Niobium is Nb. We use cookies to ensure that we give you the best experience on our website. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. The Cookies Statement is part of our Privacy Policy. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Radon is a radioactive, colorless, odorless, tasteless noble gas. The chemical symbol for Helium is He. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). From the Greek word helios, the sun. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Titanium can be used in surface condensers. The chemical symbol for Lithium is Li. The chemical symbol for Californium is Cf. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Hafnium is Hf. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Because of its high chemical reactivity, barium is never found in nature as a free element. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. The chemical symbol for Samarium is Sm. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Although neodymium is classed as a rare earth, it is a fairly common element. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. The chemical symbol for Aluminum is Al. Infotopia presents: Helium. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. 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. 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