Give the names of the elements present in the following compounds:

(a) Quick lime


(b) Hydrogen bromide


(c) Baking soda


(d) Potassium sulphate

(a) Calcium oxide, CaO is also known as quick lime. The elements present in quick lime are: Calcium (Ca) and Oxygen (O).

(b) The chemical formula of hydrogen bromide is HBr. The elements present in hydrogen bromide are: Hydrogen (H) and Bromine (Br).


(c) Baking soda is sodium hydrogen carbonate, and its chemical formula is NaHC03. The elements present in baking soda are: Sodium (Na), Hydrogen (H), Carbon (C) and Oxygen (O).


(d) The chemical formula of potassium sulphate is K2S04. The elements present in potassium sulphate are: Potassium (K), Sulphur (S) and Oxygen (O).


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