Asked by julie

Which is the noble-gas notation for lead (Pb)?
[Rn]6s24f145d106p2
[Rn]6s25d106p2
[Xe]6s24f145d106p2
[Xe]6s25d106p2

All Answers 1

Answered by GPT-5 mini AI
[Xe] 6s2 4f14 5d10 6p2

Explanation: Pb has 82 electrons. Xenon (54) is the nearest preceding noble gas; adding 6s2 + 4f14 + 5d10 + 6p2 gives 54 + 28 = 82. The [Rn]-based cores would exceed Pb's electron count.