Bariu
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Bariul este elementul chimic cu numărul 56 în tabelul periodic al elementelor.
89 Ac, 13 Al, 95 Am, 47 Ag, 18 Ar, 33 As, 85 At, 79 Au, 7 N, 56 Ba, 4 Be, 97 Bk, 83 Bi, 107 Bh, 5 B, 35 Br, 48 Cd, 20 Ca, 98 Cf, 6 C, 58 Ce, 55 Cs, 17 Cl, 27 Co, 24 Cr, 29 Cu, 96 Cm, 110 Ds, 66 Dy, 105 Db, 99 Es, 68 Er, 63 Eu, 100 Fm, 26 Fe, 9 F, 15 P, 87 Fr, 64 Gd, 31 Ga, 32 Ge, 72 Hf, 108 Hs, 2 He, 1 H, 67 Ho, 49 In, 53 I, 77 Ir, 36 Kr, 57 La, 103 Lr, 3 Li, 71 Lu, 12 Mg, 25 Mn, 109 Mt, 101 Md, 80 Hg, 42 Mo, 11 Na, 60 Nd, 10 Ne, 93 Np, 28 Ni, 41 Nb, 102 No, 76 Os, 8 O, 46 Pd, 78 Pt, 82 Pb, 94 Pu, 84 Po, 19 K, 59 Pr, 61 Pm, 91 Pa, 88 Ra, 86 Rn, 75 Re, 45 Rh, 111 Rg, 37 Rb, 44 Ru, 104 Rf, 62 Sm, 21 Sc, 106 Sg, 34 Se, 14 Si, 50 Sn, 51 Sb, 38 Sr, 16 S, 81 Tl, 73 Ta, 43 Tc, 52 Te, 65 Tb, 22 Ti, 90 Th, 69 Tm, 112 Uub, 116 Uuh, 118 Uuo, 115 Uup, 114 Uuq, 117 Uus, 113 Uut, 92 U, 23 V, 74 W, 54 Xe, 39 Y, 70 Yb, 30 Zn, 40 Zr