Q.

Identify the elements X and Y using the ionization energy values given below:Ionization energy (kJ/mol)                                1st                         2nd          X                   495                       4563          Y                   731                       1450

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a

X=Na;Y=Mg

b

X=F;Y=Mg

c

X=Mg;Y=F

d

X=Mg;Y=Na

answer is A.

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Identify the elements X and Y using the ionization energy values given below:Ionization energy (kJ/mol)                                1st                         2nd          X                   495                       4563          Y                   731                       1450