Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. The chemical symbol for Berkelium is Bk. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. To find out more, see our, “Calculation of the relative speed of sound in a gas mixture”. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Easy Game Level. The chemical symbol for Tin is Sn. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Helium is the second lightest and second most abundant element in the observable universe (hydrogenis the lightest and most abundant). I would be delighted to receive corrections as well as additional referenced uses.. filling balloons (blimps) as it is a much safer gas than hydrogen; widely used as an inert gas shield for arc welding in countries where helium is cheaper than argon Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Helium is atomic number 2 on the periodic table, with the element symbol He. Helium-3 was discovered in 1939. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. 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. Caesium has physical and chemical properties similar to those of rubidium and potassium. Cerium is the second element in the lanthanide series. All of its isotopes are radioactive. It is a noble metal and a member of the platinum group. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. 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 Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. It has two protons and two electrons in its nucleus. Log in, This site uses cookies to improve your experience. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. The chemical symbol for Titanium is Ti. The chemical symbol for Osmium is Os. It has 2 protons and 2 electrons in the atomic structure. The chemical symbol for Rubidium is Rb. The chemical symbol for Europium is Eu. The chemical symbol for Neon is Ne. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The chemical symbol for Helium is He. 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”. The chemical symbol for Lawrencium is Lr. Helium atoms have 2 electrons and the shell structure is 2. The chemical symbol for Astatine is At. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. The chemical symbol for Arsenic is As. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. The chemical symbol for Lithium is Li. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Thorium is moderately hard, malleable, and has a high melting point. Iron is a metal in the first transition series. The ground state electronic configuration of neutral helium is 1s2 and the term … Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. 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. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Francium is an alkali metal, that has one valence electron. Although neodymium is classed as a rare earth, it is a fairly common element. The following uses for helium are gathered from a number of sources as well as from anecdotal comments. Elemental sulfur is a bright yellow crystalline solid at room temperature. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. 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 Nobelium is No. The chemical symbol for Mercury is Hg. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. 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. Pure radium is silvery-white alkaline earth metal. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Thulium is the thirteenth and third-last element in the lanthanide series. Detailed decay information for the isotope helium-3 including decay chains and daughter products. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. It's the lightest noble gas. The chemical symbol for Niobium is Nb. The chemical symbol for Plutonium is Pu. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Berkelium is a member of the actinide and transuranium element series. (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. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Lawrencium is the final member of the actinide series. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. 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