Golongan Periode 1 2 3 4 5 6 7 8 9 10 11 12 20 H=1 Li = 7 Na = 23 K = 39 Cu = 63 Rb = 85 Ag = 108 Cs = 133 Au = 199 Tabel 3.3 Tabel periodik Mendeleev (1876). Be = 9,4 Mg = 24 Ca = 40 Zn = 65 Sr = 87 Cd = 112 Ba = 137 am B = 11 Al = 27,3 ? = 44 ? = 68 ?Yt = 88 in = 113 ?Di = 138 ? Er = 178 Hg = 200 TI = 204 IV C = 12 Si= 28 Ti = 48 ? = 72 Zr = 90 Sn = 118 ?Ce = 140 i ?La = 180 Pb = 207 Th= 231 N = 14 P = 31 V = 51 As = 75 Nb = 94 VI 0 = 16 S = 32 Cr = 52 Bi = 208 Se = 78 Mo = 96 Sb = 122 Te = 125 Ta = 182 W = 184 U = 240 VII F = 19 Cl = 35,5 Mn = 55 Br = 80 ? = 100 1 = 127 VIII Fe = 56, Co = 59. Ni = 59, Cu = 63 Ru = 104, Rh = 104 Pd = 106, Ag = 108 Os = 195, Ir = 197 Pt 198, Au = 199 TOLONG DIJAWAB DG BENAR