Describe the general solubility rule for salts: (a) sodium, potassium and ammonium salts are soluble (b) nitrates are soluble (c) chlorides are soluble, except lead and silver (d) sulfates are soluble, except barium, calcium and lead (e) carbonates are insoluble, except sodium, potassium and ammonium (f) hydroxides are insoluble, except sodium, potassium, ammonium and calcium (partially)
Describe the relationship between group number and the charge of the ions formed from elements in that group
Determine the electronic configuration of elements and their ions with proton number 1 to 20, e.g. 2,8,3