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History, 16.10.2020 08:01 ansbert289

Which set of elements represents a period within the periodic table?
A: H, He, Ar, Xe, and Rn
B: K, V, Fe, Ga, and Kr
C: N, P, As, Sb, and Bi
D: La, Pd, Sm, Tb, and Yb

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Which set of elements represents a period within the periodic table?
A: H, He, Ar, Xe, and Rn...
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