Question

Match and select the correct answer using the codes given below:

Answer 1

(A) The third alkali metal is potassium. Its electronic configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^1$.

(B) The second transition element is titanium. Its electronic configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{2}4s^2$.

(C) The fourth noble gas element is krypton. Its electronic configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^6$.

(D) The second halogen element is chlorine. Its electronic configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^5$.

A-4, B-3, C-2, D-1