Asked by marisol
How many valence electrons does the element located in group 1, period 4 contain?
A. 1 B. 3 C. 7 D. 8
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A. 1
Group 1 are alkali metals with one valence electron. The period-4 member is potassium (K), with electron configuration [Ar] 4s1 → one valence electron.
Group 1 are alkali metals with one valence electron. The period-4 member is potassium (K), with electron configuration [Ar] 4s1 → one valence electron.
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