Question

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 1

Answer: (B)

$Z=9$; $1s^{2}2s^{2}2p^5$
$Z=12$; $1s^{2}2s^{2}2p^{6}3s^s$
$Z=16$; $1s^{2}2s^{2}2p^{6}3p^4$
$Z=36$; $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^6$
Electropositivity decreases along the period while it increases going down the group.