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The first four ionization energies of an...

The first four ionization energies of an element are `191, 578, 872`, and `5962 "kca"l`. The number of valence electrons in the element is.

A

1

B

2

C

3

D

5

Text Solution

Verified by Experts

The correct Answer is:
c
Since there is a large jump in the third and fourth
ionization energies therefore after removal of the
third electron , the cation has the inert gas
configuration . Therefore , the valency of the metal is 3.
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