Chapter 3: Atoms and Molecules

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Atoms and Molecules


Q.5: Give the names of the elements present in the following compounds:

(a) Quick lime

(b) Hydrogen bromide

(c) Baking powder

(d) Potassium sulphate.


(a)- The chemical name of quicklime is calcium oxide. It contains calcium and oxygen elements and its chemical formula is CaO.

(b)- The chemical formula of hydrogen bromide is HBr. It contains hydrogen and bromine elements.

(c)- The chemical name of baking powder is sodium bicarbonate and its chemical formula is NaHCO3. It contains sodium, hydrogen, carbon, and oxygen elements.

(d)- The chemical formula of potassium sulphate is K2SO4. It contains potassium, sulphur, and oxygen elements.

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