Chemistry, 24.11.2020 22:40 champqc702

Of the following, which information is obtained by looking at the group numbers of elements? (Group A number designations: 1A-8A)
The number of electrons that could be gained or lost by an atom to satisfy the
octet rule.
The number of valence electrons in an atom.
The number of energy levels in an atom.
Both A and B.

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