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For all of the following items, specify how much
- electrons they have total
- How many valence electrons are present
Atoms: carbon, magnesium, phosphorus and argon
Solution: - C: 6 e– in total, shells n=1: 2e–, n=2: 4e–
valence electrons: 4 - Mg: 12 e– in total, shells n=1: 2e–, n=2: 8e–, n=3: 2e–
valence electrons: 2 - P: 15 e– in total, shells n=1: 2e–, n=2: 8e–, n=3: 5e–
valence electrons: 5 - Ar: 18 e– in total, shells n=1: 2e–, n=2: 8e–, n=3: 8e–
valence electrons: 8
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