Q.4 (ii) Atomic number of chlorine is 17.(a) Write the electronic configuration of chlorine.(b) What is the number of electrons in the valence shell of chlorine ?(c) Write the molecular formula of chlorine.(d) Name the type of bond in the formation o…

Answer: (a) 2, 8, 7; (b) 7; (c) Cl₂; (d) a single covalent bond; (e) shown below.

(a) K = 2, L = 8, M = 7, i.e. 2, 8, 7.

(b) 7 electrons in the valence (M) shell.

(c) Cl₂.

(d) Each chlorine atom needs one electron to complete its octet, so the two atoms share one pair of electrons and form a single covalent bond (Cl–Cl).

(e) Electron dot structure: each Cl atom is drawn with its 7 valence electrons, and one electron from each atom forms the shared pair between them. Each Cl then has 3 lone pairs plus the shared pair, which completes its octet:

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:Cl : Cl:
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