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A brief information about elements W, X,...

A brief information about elements `W, X, Y` and `Z` is given below :
`W` : It has two electron shells both of which are completely filled.
`X` : It has three electron shells in total and there are four electrons in the valence shell.
`Y` : It has three electron shells in total and first and third shell have two electrons each.
`Z` : It has twice as many electrons in its second shell as in its first shell and second shell is the valence shell.
Identify `W, X, Y` and `Z`.

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
C
Ne : 2, 8 Si : 2, 8, 4
Mg : 2, 8, 2 C : 2, 4
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