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The sucessive ionisation energy values f...

The sucessive ionisation energy values for an element X are given below:
a) 1st ionisation energy=`410 kJ mol^(-1)` b)2nd ionisation energy=`820 kJ mol^(-1)`
c) 3rd ionisation energy = `1100 kJ mol^(-1)` d) 4th ionisation energy = 1500 `kJ mol^(-1)`
5th ionisation energy=`3200 kJ mol^(-1)`
Find out the number of valence electron for the atom, X:

A

4

B

3

C

5

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
The ionisation energy values for valence electrons are comparable to remove electrons from inner shell very high amount of energy is needed. In the given values there is a biggest jump between `IE_(4) and IE_(5)`. Hence, there are four valence electrons for the atom X.
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