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The electronic configuration of two elem...

The electronic configuration of two elements X and Y are given below:
X = `1s^2 2s^2 2p^6 3s^2 3p^6 4s^2` Y= `1s^2 2s^2 2p^6 3s^2 3p^5` The formula of the ionic compound can be formed between these elements is

A

xy

B

`xy_(2)`

C

`x_(2)y`

D

`xy_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`(1s^(2)2s^(2)2p^(6)3s^(2)3p^(6) 3s^(2))` has two valence electrons to therefore it readily loses these electron to form `X^(2+)` than nearest noble gas configuration. Therefore, it gains one electron easily to form `Y^(-)` combine with ion of `X^(2+)` to form compound , `XY_(2)`
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