Which element is more likely to form a positive ion. Calcium or nitrogen

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

How many grams of n2h4 will be consumed by 23 g of n2o4

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