45th B.P.S.C. (Pre) 2001
Which of the following is the electron configuration of a metallic element?
a2, 8
b2, 8, 7
c2, 8, 8
d2, 8, 8, 2✓ Correct
Explanation
The electronic configuration 2, 8, 8, 2 is for an alkaline earth metal (calcium). The electronic configuration 2, 8 is for an inert gas (neon). The electronic configuration 2, 8, 7 is for chlorine (halogen). The electronic configuration 2, 8, 8 is for an inert gas (argon).
general-science