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10 questions from this quiz
18 electrons
Dumbbell (figure-of-eight)
Three p-orbitals at 90°
Shell n=3n=3n=3
4s sub-shell
1 electron in each of the 3 orbitals
10 electrons
1s2 2s2 2p41s^2 \, 2s^2 \, 2p^41s22s22p4
Two 4s electrons
s-block
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