The notation that expresses the number of electrons involved when an atom reacts chemically is the ______ number.

The notation that expresses the number of electrons involved when an atom reacts chemically is the ______ number.

The notation that expresses the number of electrons involved when an atom reacts chemically is the ______ number.


A) Combination
B) Period
C) Reaction
D) Valence


Answer: D) Valence


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