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18/09/2020 11:11 am
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The five successive ionization enthalpies of an element are 800, 2427, 3658, 35024 and 32824 kJ mol–1. The number of valence electrons in the element is:
(1) 4
(2) 3
(3) 5
(4) 2
1 Answer
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18/09/2020 11:12 am
(2) 3
Explanation:
As difference in 3rd and 4th ionisation energies is high so atom contains 3 valence electrons.