Question 20
How many valence electrons are there in atoms that have each of the following electron configurations (enter an
integer)?
(a) 1s2 2s2 2p6 3s2 3p6 4s1
(b) 1s2 2s2 2p6
(c) 1s2 2s2 2p6 3s2 3p1
(d) 1s2 2s2 2p6 3s2 3p6 4s2
valence electrons
valence electrons
valence electrons
valence electrons
4 pts
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