The elements A, B, C and D have atomic numbers 9, 10, 11 and 12 respec – InterviewSolution

InterviewSolution

1.

The elements A, B, C and D have atomic numbers 9, 10, 11 and 12 respectively. The correct order of ionization energy is 1) D > C > B > A 2) A > B > C > D 3) B > A > C > D 4) B > A > D > C

Answer»

4) B > A > D > C

Element (given)	Atomic number	Element name
A	9	Fluorine
B	10	Neon
C	11	Sodium
D	12	Magnesium

B (inert gas) > A (halogen) > D (fully filled s - orbital) > C (alkali mental)

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