Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Helium was isolated by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve at 1895 in London, England and Uppsala, Sweden. The chemical symbol for Bromine is Br. The chemical symbol for Technetium is Tc. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). Krypton is a member of group 18 (noble gases) elements. The chemical symbol for Berkelium is Bk. 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 Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. The prima… 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. The chemical symbol for Bismuth is Bi. The chemical symbol for Krypton is Kr. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The chemical symbol for Copper is Cu. Helium is the second element on the periodic table, with atomic number 2 and element symbol He. Gold is a transition metal and a group 11 element. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. 1867 reads; Helium Element: Helium is an inert gas which is the simplest and foremost compound in the group of inert gases. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. In the periodic table, potassium is one of the alkali metals. It is a noble metal and a member of the platinum group. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. Helium's location in the periodic table of the elements. The chemical symbol for Samarium is Sm. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The atmospheric content of helium on the Earth is only 5.2 ppm . The chemical symbol for Americium is Am. Carbon is one of the few elements known since antiquity. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 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. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. The chemical symbol for Zirconium is Zr. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. Compare Helium and Carbon. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 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. Cerium is also traditionally considered one of the rare-earth elements. Therefore the electronegativity is greatest at the top-right of the periodic table and decreases toward the bottom-left. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Helium is used as carrier gas in chromatography technique. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. The chemical symbol for Oxygen is O. 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. The chemical symbol for Ruthenium is Ru. 2) You may not distribute or commercially exploit the content, especially on another website. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Neptunium metal is silvery and tarnishes when exposed to air. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. The chemical symbol for Curium is Cm. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. 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. Cerium is the second element in the lanthanide series. The chemical symbol for Platinum is Pt. Thulium is the thirteenth and third-last element in the lanthanide series. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 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. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. In 1895 Ramsay discovered helium in the uranium mineral cleveite while it was independently discovered in cleveite by the Swedish chemists Cleve and Langlet at about the same time. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Helium is the second most abundant element in the universe. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Tellurium is chemically related to selenium and sulfur. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. The chemical symbol for Aluminum is Al. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 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. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The chemical symbol for Rhenium is Re. Interactive periodic table showing names, electrons, and oxidation states. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and … Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. CAS Registry: 7440-59-7. Helium atoms have 2 electrons and the shell structure is 2. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 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. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Caesium has physical and chemical properties similar to those of rubidium and potassium. It is occasionally found in native form as elemental crystals. The chemical symbol for Boron is B. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Lawrencium is the final member of the actinide series. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 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. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Francium is an alkali metal, that has one valence electron. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 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. Common chemical compounds are also provided for many elements. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). 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. Todd Helmenstine. The chemical symbol for Antimony is Sb. Helium is the most abundant gas in the Earth’s heterosphere (the layer of atmosphere around 80km above Earth). Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. When shown an element symbol, find the corresponding … Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Helium is element number 2 on the periodic table. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. The chemical symbol for Tellurium is Te. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The helium atom is trapped inside a fullerene which is made up entirely of carbon. Tellurium is far more common in the universe as a whole than on Earth. 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 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. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. The chemical symbol for Radon is Rn. Only about 5×10−8% of all matter in the universe is europium. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Rutherford and Royds in 1907 demonstrated that alpha particles are helium nuclei. Helium is used to detect cracks in buildings with high-vacuum rooms, and high-pressure containers, as it can efficiently diffuse through solids. 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. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. The chemical symbol for Sodium is Na. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Origin of Name: From the Greek word helios, meaning sun: Date and Place of Discovery: 1868 in France and in England 1895 in England: Discovered by: Pierre Janssen in France first noticed a bright yellow line during an eclipse (1868); Norman Lockyer in England noticed a yellow line in the solar spectrum (1868); Sir William Ramsay discovered helium on earth (1895) Elemental sulfur is a bright yellow crystalline solid at room temperature. The chemical symbol for Actinium is Ac. Sodium is a soft, silvery-white, highly reactive metal. Its boiling point is the lowest among all the elements. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Platinum is one of the least reactive metals. The chemical symbol for Californium is Cf. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Under standard conditions, it is the lightest metal and the lightest solid element. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Visualize trends, 3D orbitals, isotopes, and mix compounds. The chemical symbol for Mendelevium is Md. al. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. 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. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. The chemical symbol for Uranium is U. Block in periodic table: p. Shell structure: 2. For this purposes, a dimensionless quantity the Pauling scale, symbol χ, is the most commonly used. In fact their absorption cross-sections are the highest among all stable isotopes. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. The chemical symbol for Xenon is Xe. The electronegativity of Helium is: χ = —. Iron is a metal in the first transition series. The chemical symbol for Fermium is Fm. The chemical symbol for Nobelium is No. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. and Gay-Lussac, L.-J. The chemical symbol for Silicon is Si. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Hence its mass number is four (the total number protons and neutrons, collectively called nucleons). Chlorine is a yellow-green gas at room temperature. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. 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. If you continue to use this site we will assume that you are happy with it. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Fermium is a member of the actinide series. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. The chemical symbol for Zinc is Zn. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. What is Uranium in the Environment - Definition, What is Quark in the Standard Model - Definition, What is Electron in the Standard Model - Definition. Francium is a highly radioactive metal that decays into astatine, radium, and radon. When shown an element name, find the corresponding element atomic number and symbol in the periodic table as quickly as you can!. 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. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. The chemical symbol for Thulium is Tm. All of its isotopes are radioactive. The chemical symbol for Titanium is Ti. The chemical symbol for Helium is He. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Tin is a post-transition metal in group 14 of the periodic table. The chemical symbol for Gold is Au. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Helium is a 2. chemical element in the periodic table of elements. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. The ground state electronic configuration of neutral helium is 1s2 and the term … Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 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. The chemical symbol for Gadolinium is Gd. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Einsteinium is the seventh transuranic element, and an actinide. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. The name samarium is after the mineral samarskite from which it was isolated. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. The chemical symbol for Astatine is At. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. Thorium is moderately hard, malleable, and has a high melting point. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. 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. 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 Indium is In. The chemical symbol for Lawrencium is Lr. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. 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. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Its boiling point is the lowest among all the elements. 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 Lutetium is Lu. It's the lightest noble gas. 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