Question

Which of the following groups contain three elements with stable electron configurations?

a. lithium, krypton, argon
b. argon, neon, barium
c. xenon, neon, boron
d. helium, xenon, neon

Answer 1

It’s D because a. contains carbon which is not a noble element and b. contains boron which is not a member whilst c. contains calcium which is not included.

Answer 2

(D) Helium, Xenon, Neon ..........must be the answer.