Which of the following is true?

A. Atomic weight is determined by the number of electrons in an atom of a given element.

B. Atomic weight is determined by the number of protons in an atom of a given element.

C. The reactivity of an atom is based on the number of electrons in its outer valance.

D. The chemical reactivity of an atom is based on the overall number of electrons in the atom.

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Lelia LubowitzLv2

2 Dec 2018

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