02PeriodicProperties-1

02PeriodicProperties-1 - Chemical Periodicity & the...

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Chemical Periodicity & the Periodic Table Chemical Principles of Marine Systems SIO141/CHEM174 Tuesday, October 2, 2007 1
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Mendeleyev & the Periodic Table Based his periodic table on his knowledge of the properties of the elements: Atomic weight A few physical properties Formul æ of hydrides and oxides 2
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Mendeleyev’s earliest periodic table (1869) Ti = 50 Zr = 90 ? = 180 V = 51 Nb = 94 Ta = 182 Cr = 52 Mo = 96 W = 186 Mn = 55 Rh = 104,4 Pt = 197.4 Fe = 56 Ru = 104,4 Ir = 198 Ni = Co = 59 Pd = 106,6 Os = 199 H = 1 Cu = 63,4 Ag = 108 Hg = 200 Be = 9,4 Mg = 24 Zn = 65.2 Cd = 112 B = 11 Al = 27.4 ? = 68 Ur = 112 Au = 197 ? C = 12 Si = 28 ? = 70 Sn = 118 N = 14 P = 31 As = 75 Sb = 122 Bi = 210 ? O = 16 S = 32 Se = 79.4 Te = 128? F = 19 Cl = 35,5 Br = 80 J = 127 Li = 7 Na = 23 K = 39 Rb = 85,4 Cs = 133 Tl = 204 Ca = 40 Sr = 87.6 Ba = 137 Pb = 207 ? = 45 Ce = 92 ? Er = 56 La = 94 ? Yt = 60 Di = 95 ? In = 75,6 Th = 118? 3
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He felt some of the atomic weights must be wrong! Ti = 50 Zr = 90 ? = 180 V = 51 Nb = 94 Ta = 182 Cr = 52 Mo = 96 W = 186 Mn = 55 Rh = 104,4 Pt = 197.4 Fe = 56 Ru = 104,4 Ir = 198 Ni = Co = 59 Pd = 106,6 Os = 199 H = 1 Cu = 63,4 Ag = 108 Hg = 200 Be = 9,4 Mg = 24 Zn = 65.2 Cd = 112 B = 11 Al = 27.4 ? = 68 Ur = 112 Au = 197 ? C = 12 Si = 28 ? = 70 Sn = 118 N = 14 P = 31 As = 75 Sb = 122 Bi = 210 ? O = 16 S = 32 Se = 79.4 Te = 128? F = 19 Cl = 35,5 Br = 80 J = 127 Li = 7 Na = 23 K = 39 Rb = 85,4 Cs = 133 Tl = 204 Ca = 40 Sr = 87.6 Ba = 137 Pb = 207 ? = 45 Ce = 92 ? Er = 56 La = 94 ? Yt = 60 Di = 95 ? In = 75,6 Th = 118? 4
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He predicted some (then unknown) elements! Ti = 50 Zr = 90 ? = 180 V = 51 Nb = 94 Ta = 182 Cr = 52 Mo = 96 W = 186 Mn = 55 Rh = 104,4 Pt = 197.4 Fe = 56 Ru = 104,4 Ir = 198 Ni = Co = 59 Pd = 106,6 Os = 199 H = 1 Cu = 63,4 Ag = 108 Hg = 200 Be = 9,4 Mg = 24 Zn = 65.2 Cd = 112 B = 11 Al = 27.4 ? = 68 Ur = 112 Au = 197 ? C = 12 Si = 28 ? = 70 Sn = 118 N = 14 P = 31 As = 75 Sb = 122 Bi = 210 ?
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This note was uploaded on 09/19/2011 for the course CHEM 174 taught by Professor Staff during the Spring '09 term at UCSD.

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02PeriodicProperties-1 - Chemical Periodicity & the...

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