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The first four ionisation enthalpy value...

The first four ionisation enthalpy values of an element are 191, 578, 872 and 5962 kcal `mol^(-1)` respectively. The no. of valence electrons in the element is

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
As there is a huge gap between third and fourth ionisation energy thus after losing 3 electron the element acquires noble gas configuration. Number of valence electrons = 3.
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