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Electronic configuratios of four element...

Electronic configuratios of four elements `A, B, C` and `D` are given below:
(i) `1s^(2)2s^(2)2p^(6)` (ii) `1s^(2)2s^(2)2p^(4)` (iii) `1s^(2)2s^(2)2p^(6)3s^(1)` (iv) `1s^(2)2s^(2)2p^(5)`
Which of the following is the correct order of increasing tendency of gain electron:

A

AltCltBltD

B

AltBltCltD

C

DltBltCltA

D

DltAltBltC

Text Solution

Verified by Experts

The correct Answer is:
A
A is Ne(10):`1s^(2)2s^(2)2p^(6)`
B is O(8):`1s^(2)2s^(2)2p^(4)`
C is NA(11):`1s^(2)2s^(2)2p^(6)3s^(1)`D is `F(9):1s^(2)2s^(2)2p^(5)`,
Noble gases (A)have completely filled orbitals hence,they have no tendency to gain electrons.
Element C prefers to lose electron `(3s^(1))` to attain stable noble gas configuration. Element D has Only 1 electron less than stable noble gas configuration.Thus,it has greater tendency to gain electron than element B which has 2 electrons less than noble gas configuration.Thus,the correct order of increasing tendency to gain electron is:AltCltBltD
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