How do elements with similar electrons compare in their chemical properties?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

Which substance has non polar covalent bonds