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Among the following the third ionization...

Among the following the third ionization energy is highest for

A

magnesium

B

boron

C

beryllium

D

aluminium

Text Solution

Verified by Experts

The correct Answer is:
C
Both Mg and Be have two valence electrons, therefore third ionisation energy of each atom is he highest. Since atomic size of Be is smaller than that of Mg. therefore, third ionisation energy of Be is higher than that of Mg .
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