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Hydrogen and its compounds
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Elements of group IA: Li Na K Rb Cs Fr
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Elements of group IIA: Be Mg Ca Sr Ba Ra
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Elements of group IIIA: B Al Ga In Tl
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Elements of group IVA: C Si Ge Sn Pb
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Elements of group VA: N P As Sb Bi
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Elements of group VIA: O S Se Te Po
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Elements of group VIIA: F Cl Br I At
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Elements of group VIIIA: He Ne Ar Kr Xe Rn
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General characteristics of df-elements.
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Elements of group IB: Cu Ag Au
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Elements of group IIB: Zn Cd Hg
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Elements of group IIIB: Sc Y
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Lanthanides: La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
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Actinides: Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
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Elements of group IVB: Ti Zr Gf Rf
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Elements of group VB: V Nb Ta Db
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Elements of group VIB: Cr Mo W Sg
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Elements of group VIIB: Mn Tc Re Bh
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Elements of group VIIIB: Fe Co Ni Ru Rh Pd Os Ir Pt