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Which of the following sets of elements have the same number of valence electrons?
P, S, Cl because they are in the same period
B, Al, Ga because they are in the same group
Na, Ca, Ba because they are in the first two groups
Ag, Cd, Ar because they are transition elements and a noble gas
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Which of the following sets of elements have the same number of valence electrons?
P, S, Cl because...
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