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Question: Among the elements with atomic numbers 9, 12, 16 and 36 which is highly electropositive?...

Among the elements with atomic numbers 9, 12, 16 and 36 which is highly electropositive?

A

Element with atomic number 9

B

Element with atomic number 12

C

Element with atomic number 16

D

Element with atomic number 36

Answer

Element with atomic number 12

Explanation

Solution

: Z = 9; 1s22s22p51s^{2}2s^{2}2p^{5}

Z = 12 ;1s22s22p63s21s^{2}2s^{2}2p^{6}3s^{2}

Z = 16; 1s22s22p63s23p41s^{2}2s^{2}2p^{6}3s^{2}3p^{4}

Z = 36; 1s22s22p63s23p63d104s24p61s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{6}

Electropositivity decreases along the period while it increases going down the group.