A) \[Mg\] atom has less number of neutrons than \[Al\]
B) \[A{{l}^{3+}}\] has a higher nuclear charge than \[M{{g}^{2+}}\]
C) Their electronegativities are different
D) \[Al\] has a lower ionisation potential than \[Mg\] atom
Correct Answer: B
Solution :
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