Question

19. Fill in the blanks with the correct words.

(b). We require ______ (valency/atomicity) for writing a chemical formula.

Answer 1

• The number of atoms present in one molecule of the element is called atomicity.
• The measure of the ability of an atom of an element to combine with the atom of the other elements is called the valency of an element or it is the combining power of an element.
• A set of chemical symbols showing the elements present in a compound and their relative properties is called a chemical formula.
• We require the valency of elements present in a given compound for writing its chemical formula.

Therefore, we require valency for writing a chemical formula.