Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. 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). Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Tungsten is an intrinsically brittle and hard material, making it difficult to work. The chemical symbol for Neptunium is Np. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The chemical symbol for Mendelevium is Md. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. The atomic number uniquely identifies a chemical element. Our Website follows all legal requirements to protect your privacy. Europium is one of the least abundant elements in the universe. The chemical symbol for Einsteinium is Es. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. It is a Transition metal in Group 6. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Cerium is the second element in the lanthanide series. 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. The chemical symbol for Tungsten is W. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The chemical symbol for Silver is Ag. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. We use cookies to ensure that we give you the best experience on our website. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. 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). Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The chemical symbol for Bromine is Br. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. The chemical symbol for Terbium is Tb. The chemical symbol for Americium is Am. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. 1) You may use almost everything for non-commercial and educational use. The chemical symbol for Plutonium is Pu. Carbon is one of the few elements known since antiquity. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. The chemical symbol for Tin is Sn. The chemical symbol for Thorium is Th. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The bulk properties of astatine are not known with any certainty. The chemical symbol for Titanium is Ti. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 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. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. 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. Chlorine is a yellow-green gas at room temperature. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure.    Non-Metals The chemical symbol for Curium is Cm. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Pure germanium is a semiconductor with an appearance similar to elemental silicon. It is a noble metal and a member of the platinum group. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. The chemical symbol for Chromium is Cr. Under standard conditions, it is the lightest metal and the lightest solid element. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state.  Comments Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The chemical symbol for Radium is Ra. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The name samarium is after the mineral samarskite from which it was isolated. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 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. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. The chemical symbol for Palladium is Pd. The chemical symbol for Lanthanum is La. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. In the periodic table, potassium is one of the alkali metals. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Fermium is a member of the actinide series. Uranium has the highest atomic weight of the primordially occurring elements. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Radon is a radioactive, colorless, odorless, tasteless noble gas. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 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. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table).

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