Atoms of this kind appear to be chemically active because the outermost cloud has ______ (number) negative particles and a full complement of _____ (number) is necessary if the atom is to maintain che

Atoms of this kind appear to be chemically active because the outermost cloud has ______ (number) negative particles and a full complement of _____ (number) is necessary if the atom is to maintain che

Atoms of this kind appear to be chemically active because the outermost cloud has ______ (number) negative particles and a full complement of _____ (number) is necessary if the atom is to maintain chemical stability.