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Which of the following atoms has the low...

Which of the following atoms has the lowest ionization potential ?

A

`""_(8)O^(16)`

B

`""_(7)N^(14)`

C

`""_(55)Cs^(133)`

D

`""_(18)Ar^(40)`

Text Solution

Verified by Experts

The correct Answer is:
C
The ionisation potential or ionisation energy is the energy necessary to remove an electron from the neutral atom. It is minimum for the alkali metals which have a single electron outside a closed shell.
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