Chemistry
Write the molecular formulae for the oxides and sulphides of the following elements.
(a) Sodium
(b) Calcium
(c) Hydrogen
Related Questions
Define:
(a) Radical
(b) Valency
(c) Molecular formula
Give the symbols and valencies of the following radicals:
(a) Hydroxide
(b) Chloride
(c) Carbonate
(d) Ammonium
(e) Nitrate
Write the molecular formulae for the following compounds and name the elements present.
(a) Baking soda
(b) Common salt
(c) Sulphuric acid
(d) Nitric acid
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds.
(a) Aluminium chloride
(b) Aluminium oxide
(c) Aluminium nitride
(d) Aluminium sulphate