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General chemistry
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General chemistry
manganese
Chemistry; General chemistry
A chemical element, designated by the symbol Mn. It has the atomic number 25. It is found as a free element in nature (
cobalt
Chemistry; General chemistry
A chemical element with symbol Co and atomic number 27. It is found naturally only in chemically combined form. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray ...
nickel
Chemistry; General chemistry
A chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge.
copper
Chemistry; General chemistry
A chemical element with the symbol Cu, and atomic number 29. It is a ductile, semi-precious metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed ...
gallium
Chemistry; General chemistry
A chemical element that has the symbol Ga and atomic number 31. Elemental gallium does not occur in nature, but as the gallium salt in trace amounts in bauxite and zinc ores.
germanium
Chemistry; General chemistry
A chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group.
arsenic
Chemistry; General chemistry
A chemical element with the symbol As, atomic number 33 and relative atomic mass 74. 92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental ...
