ALKALI: H, Li, Na, K, Fr, ALAKALINE EARTH METALS: Be, Mg, Ca, Sr, Ba, BORON GROUP: B, Al, Ga, In, Tl, CARBON GROUP: C, Si, Ge, Sn, Pb, PNICTOGEN : N, P, As, Bi, Sb, CHALCOGENS : O, S, Se, Te, Po, HALOGENS: F, Cl, Br, I, Ts, NOBLE GASES: He, Ne, Ar, Kr, Xe,

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