Xenon is heavy among noble gases yet it can form compounds under special lab conditions unlike earlier textbook oversimplifications but it still belongs in Group 18 because of its filled valence octet in simple Lewis teaching. Compared with krypton in the same group xenon atoms are usually described as what?
Q1. Xenon is heavy among noble gases yet it can form compounds under special lab conditions unlike earlier textbook oversimplifications but it still belongs in Group 18 because of its filled valence octet in simple Lewis teaching. Compared with krypton in the same group xenon atoms are usually described as what?
Answer: Larger with more electron shells down the group trend
Explanation: Atomic radius increases down a group because each successive element has one more electron shell, increasing the distance between the nucleus and outermost electrons; xenon (period 5) is therefore larger than krypton (period 4).