Question

Write down the
(i) Electronic configuration of chlorine atom
(ii) Chloride ion
(iii) Fractional mass of chlorine

Answer 1

Chlorine (Cl)

Explanation:

(i) Electronic configuration of Chlorine (Cl) with atomic number 17 is:

1s2, 2s2, 2p6, 3s2, 3p5

(ii) The chloride ion is the anion Cl⁻. It is formed when the element chlorine gains an electron or when a compound such as hydrogen chloride is dissolved in water or other polar solvents.

(iii) Chlorine has fractional atomic mass number because it has two isotopes having atomic mass number 35 and 37 in the ratio 3:1. Therefore, the fractional molar mass of chlorine is approximately 35.5.