H 100 1.008 1 He 200 4.002 2 Li 300 6.940 3 Be 400 9.012 4 B 500 10.810 5 C 600 12.011 6 N 700 14.007 7 O 800 15.999 8 F 900 18.998 9 Ne 1000 20.179 10 Na 1100 22.989 11 Mg 1200 24.305 12 Al 1300 26.981 13 Si 1400 28.085 14 P 1500 30.973 15 S 1400 32.060 14 Cl 1700 35.450 17 Ar 1800 39.948 18 K 1900 39.098 19 Ca 2000 40.078 20 Sc 2100 44.955 21 Ti 2200 47.867 22 V 2300 50.941 23 Cr 2400 51.996 24 Mn 2500 54.938 25 Fe 2600 55.845 26 Co 2700 58.933 27 Ni 2800 58.693 28 Cu 2900 63.546 29 Zn 3000 65.380 30 Ga 3100 69.723 31 Ge 3200 72.630 32 As 3300 74.921 33 Se 3400 78.971 34 Br 3500 79.904 35 Kr 3600 83.798 36 Rb 3700 85.467 37 Sr 3800 87.620 38 Y 3900 88.905 39 Zr 4000 91.224 40 Nb 4100 92.906 41 Mo 4200 95.950 42 Ru 4400 101.070 44 Rh 4500 102.905 45 Pd 4600 106.420 46 Ag 4700 107.868 47 Cd 4800 112.414 48 In 4900 114.818 49 Sn 5000 118.710 50 Sb 5100 121.760 51 Te 5200 127.600 52 I 5300 126.904 53 Xe 5400 131.293 54 Cs 5500 132.905 55 Ba 5600 137.327 56 La 5700 138.905 57 Ce 5800 140.116 58 Pr 5900 140.907 59 Nd 6000 144.242 60 Sm 6200 150.360 62 Eu 6300 151.964 63 Gd 6400 157.250 64 Tb 6500 158.925 65 Dy 6600 162.500 66 Ho 6700 164.930 67 Er 6800 167.259 68 Tm 6900 168.934 69 Yb 7000 173.045 70 Lu 7100 174.966 71 Hf 7200 178.490 72 Ta 7300 180.947 73 W 7400 183.840 74 Re 7500 186.207 75 Os 7600 190.230 76 Ir 7700 192.217 77 Pt 7800 195.084 78 Au 7900 196.966 79 Hg 8000 200.592 80 Tl 8100 204.380 81 Pb 8200 207.200 82 Bi 8300 208.980 83 Th 9040 232.037 90 U 9200 238.028 92