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16/08/2021 11:16 am
Topic starter
Which of the following should be the number of electrons present in X2+ on the basis of electronic configuration, if the ion X3- has 14 protons?
(a) 12
(b) 14
(c) 16
(d) 18
1 Answer
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16/08/2021 11:19 am
Correct answer: (a) 12
Explanation:
X3- has 14 protons, i.e., X also has 14 protons and therefore 14 electrons.
X = 14 = 1s2, 2s2 2p6 , 3s2 3p2
X2+ = 1s2, 2s2 2p2, 3s2
= 12 electrons