1.

Choose the correct answer.(a) An element in period 3 whose electron affinity is zero(i) Sulphur(ii)Sodium(iii) Neon(iv) Argon(b) An alkaline earth metal(i) Lead(ii) potassium(iii) calcium(iv) Copper(c) An element with highest ionization potential(i) Calesium(ii) Fluorine(iii) Helium(iv) Neon

Answer»

(a) (iv) Argon

(b) (iii) Calcium

(c) (iii) Helium



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