Chemical valencies of elements
Chemical valencies of elements Valence (or valency) is the capability of an atom to combine in particular proportion with another atom. Cations: Generally metallic elements (Na, K, Cu, Mg, Ca, Fe, Mn, Ni, Co, Pb) Anions: Generally non-metallic elements (O -2 , S -2 , F - , Cl - , Br - , I - ) Valency Other atoms Examples Monovalent 1 H, Li, Na, K, Cu 1 Divalent 2 Mg, Ca, Co, Cu 2 , Fe 2 , Mg, Mn 2 , Ni, O, Pb 2 , Zn). Trivalent 3 Bi, Cr 3 , Al, Fe 3 , Sb 3 Tetravalent 4 C, Si, Ti, Zr, Mn 4 , Pb 4 Pentavalent 5 P, As, Sb 5 Hexavalent 6 Cr 6 Many atoms such as Fe, Mn, Cu, Cr, Pb, and Sb have multiple valencies: they are capable of combining with other atoms in different proportions. Metals and oxides ...