Which of the following sets of elements have the [noble gas]ns2np2 valence electron configuration?

NetherCraft 0

Which is the correct answer and why?

a F, Cl, Br, I, At

b Ti, Zr, Hf

c N, P, As, Sb, Bi

d O, S, Se, Te, Po

e C, Si, Ge, Sn, Pb

3 Answers

  • the given electronic configuration is the configuration of group 4A (or 15 in IUPAC convention) so the answer is letter e.

  • What the question is asking, is which elements have the same number of valence electrons as a noble gas, plus 4. Since all noble gases have a full energy shell, you’re looking for the group of elements that have 4 valence electrons.

    that could be E: carbon, silicon…

  • None of the above – the inert gas configuration is ns^2, np^6

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