Question

Which species, in each pair is expected to have higher ionization enthalpy.
(i) 3Li, 11Na (ii) 7N, 15P
(iii) 20Ca, 12Mg (iv) 13Al, 14Si
(v) 17Cl, 18Ar (vi) 18Ar, 19K
(vii) 13Al, 14C

Answer 1

Answer:

(i) Lithium

(ii) Nitrogen

(iii) Magnesium

(iv) Aluminium

(v) Chlorine

(vi) Pottasium

(vii) Carbon

As size decreases, ionisation enthalpy increases.

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Answer 2

Explanation:

i)3Li

ii)15p

iii)12Mg

iv)14Si

V)18Ar

vi)18Ar

vii)13Al