Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. The chemical symbol for Aluminum is Al. The chemical symbol for Boron is B. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. Helium-4's boiling point of 4.2 K is the second lowest of all known substances, second only to helium-3. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. The information contained in this website is for general information purposes only. Atomic number (number of protons in the nucleus): 2 2. ... melting point (°C) −272.2* −248.59 −189.3 −157.36 Helium, the second most abundant element in the universe, was discovered on the sun before it was found on the earth.Pierre-Jules-César Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a total solar eclipse in 1868. Gold is a transition metal and a group 11 element. The chemical symbol for Silicon is Si. The chemical symbol for Mercury is Hg. The chemical symbol for Mendelevium is Md. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Liquid Helium is called a "quantum fluid" as it displays atomic properties on a macroscopic scale. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Helium is a chemical element.It has the chemical symbol He, atomic number 2, and atomic weight of about 4.002602. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. 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. For chemistry students and teachers: The tabular chart on the right is arranged by melting point. Francium is an alkali metal, that has one valence electron. 13.81 Kelvin. The chemical symbol for Americium is Am. 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. Nickel is a silvery-white lustrous metal with a slight golden tinge. Also, the element is vital in the study of super conductivity. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. 4.0026. 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. 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. Atomic weight (average mass of the atom): 4.002602 4. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Main purpose of this project is to help the public learn some interesting and important information about the peaceful uses of nuclear energy. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Below 2.18 K, thermal conductivity of helium-4 becomes more than 1,000 times greater than that of copper. Our Website follows all legal requirements to protect your privacy. 1) You may use almost everything for non-commercial and educational use. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 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). 1) You may use almost everything for non-commercial and educational use. It is a noble metal and a member of the platinum group. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Basic Information. The chemical symbol for Tellurium is Te. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Helium belongs to Group 18 the Noble Gases, a non metal that is a gas. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. 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. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Helium has the lowest melting point of any element and is widely used in cryogenic research because its boiling point is close to absolute zero. Lead is soft and malleable, and has a relatively low melting point. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 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. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. The chemical symbol for Platinum is Pt. -458 F is the melting point of helium while the boiling point is roughly -432°F. The chemical symbol for Nickel is Ni. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. It solidifies only at pressures above 25 atmospheres, where its melting point is 0.95 K. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. The chemical symbol for Zirconium is Zr. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Note that, these points are associated with the standard atmospheric pressure. Arsenic is a metalloid. In the perspective of quantum mechanics, helium is the second simplest atom to model, following the hydrogen atom. Note that, these points are associated with the standard atmospheric pressure.