Chemistry, 03.11.2020 05:00 ElizabethF

Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. Potassium (K): 1s22s22p63s23p64s1

18
core electrons
1
valence electrons
Iron (Fe): [Ar]4s23d6

18
core electrons
8
valence electrons
Argon (Ar): [Ne]3s23p6

10
core electrons
8
valence electrons
Magnesium (Mg): 1s22s22p63s2

10
core electrons
2
valence electrons

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