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Electronic configuration of four element...

Electronic configuration of four elements A, B ,C and D are given below
A) `1s^(2), 2s^(2), 2p^(6)`
B) `1s^(2), 2s^(2), 2p^(4)`
C) `1s^(2), 2s^(2), 2p^(6), 3s^(1)`
D) `1s^(2), 2s^(2), 2p^(5)`
Which of the following is the correct order of increasing tendency to gain electron?

A

`1s ^(2) 2s ^(2) 2p ^(6)`

B

`1s ^(2) 2s ^(2) 2p ^(4)`

C

`1s ^(2) 2s ^(2) 2p ^(6) 3s ^(1)`

D

`1s ^(2) 2s ^(2) 2p ^(5)`

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The correct Answer is:
A
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