Question

Which of the following groups contain three elements with stable electron configurations? A. calcium, krypton, argon B. argon, neon, xenon C. xenon, neon, boron D. helium, xenon, carbon

Answer 1

Answer: B. argon, neon, xeno

Explanation:

All these elements listed here are part of the group 18 of the periodic table, which is the last group on the right. All these elements are also called 'noble gases'. Their main property is that they have their last energy shell completely filled with electrons: so they do not easily give/receive electrons to make bonds with other elements. For this reason, these elements have the most stable electron configuration, and they do not react with other elements.

Answer 2

I think the answer would be b