Alkali Metals 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. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. It is given by the ratio of the pressure on a body to the fractional decrease in volume. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The chemical symbol for Mendelevium is Md. Ytterbium-169 in particular emits gamma rays. Copyright of and ownership in the Images reside with Murray Robertson. A higher recycling rate may reduce risk to supply. agreement. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. Half of the distance between two atoms within a single covalent bond. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. The chemical symbol for Cadmium is Cd.

The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Murray Robertson is the artist behind the images which make up Visual Elements. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. The number of protons in an atom.

1) You may use almost everything for non-commercial and educational use. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. In no event shall the RSC be liable for any damages including, without limitation, indirect or consequential damages, or any damages whatsoever arising from use or loss of use, data or profits, whether in action of contract, negligence or other tortious action, arising out of or in connection with the use of the material available from this Site. Density is the mass of a substance that would fill 1 cm3 at room temperature.

By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The availability of suitable substitutes for a given commodity. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. The chemical symbol for Radium is Ra. Only about 5×10−8% of all matter in the universe is europium. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. The chemical symbol for Molybdenum is Mo. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide.

Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. The chemical symbol for Americium is Am. Copyright © 1996-2012 Yinon Bentor. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. High = substitution not possible or very difficult. This was achieved by heating erbium nitrate until it decomposed and then extracting the residue with water to obtain two oxides; a red one, which was identified as erbium oxide and a white powder, which was named ytterbium oxide. Atomic mass. The information contained in this website is for general information purposes only. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure.

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.  Comments Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Arsenic is a metalloid. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure.

Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Ytterbium atoms have 70 electrons and the shell structure is 2.8.18.32.8.2. Nor shall the RSC be in any event liable for any damage to your computer equipment or software which may occur on account of your access to or use of the Site, or your downloading of materials, data, text, software, or images from the Site, whether caused by a virus, bug or otherwise.

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