A) Atomic size of Al > Atomic size of Mg.
B) Atomic size of Al < Atomic size of Mg.
C) Al has one electron in p - orbital
D) None of these
Correct Answer: C
Solution :
[c] \[Al(3{{s}^{2}}{{p}^{1}})\] and \[Mg(3{{s}^{2}})\]. Lower energy is required to remove\[~3{{p}^{1}}\]electron than \[3{{s}^{1}}\]electron (penetrating effect is \[s>p>d>f)\]. Secondly Mg has stable electronic configuration than Al
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