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The first ionization energy of magnesium...

The first ionization energy of magnesium is smaller as compare to that of elements X and Y, but higher than that of Z. The elements X,Y and Z respectively are:

A

Neon, sodium and chlorine

B

Argon, lithium and sodium

C

Chlorine, lithium and sodium

D

Argon, chlorine and sodium

Text Solution

Verified by Experts

The correct Answer is:
D
The `1^(st)` IE order of `3^(rd)` period is `Na lt Al lt Mg lt Si lt S lt P lt Cl lt Ar`
X and Y are Ar and Cl
Z is sodium (Na) .
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