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1 Name Atomic number Chemical symbol Relative atomic mass
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2 Hydrogen 1 H 1.01
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3 Helium 2 He 4
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4 Lithium 3 Li 6.94
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5 Beryllium 4 Be 9.01
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6 Boron 5 B 10.81
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7 Carbon 6 C 12.01
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8 Nitrogen 7 N 14.01
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9 Oxygen 8 O 16
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10 Fluorine 9 F 19
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11 Neon 10 Ne 20.18
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12 Sodium 11 Na 22.99
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13 Magnesium 12 Mg 24.31
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14 Aluminum 13 Al 26.98
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15 Silicon 14 Si 28.09
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16 Phosphorus 15 P 30.98
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17 Sulfur 16 S 32.06
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18 Chlorine 17 Cl 35.45
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19 Argon 18 Ar 39.95
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20 Potassium 19 K 39.1
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21 Calcium 20 Ca 40.08
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22 Scandium 21 Sc 44.96
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23 Titanium 22 Ti 47.9
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24 Vanadium 23 V 50.94
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25 Chromium 24 Cr 52
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26 Manganese 25 Mn 54.94
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27 Iron 26 Fe 55.85
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28 Cobalt 27 Co 58.93
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29 Nickel 28 Ni 58.71
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30 Copper 29 Cu 63.54
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31 Zinc 30 Zn 65.37
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32 Gallium 31 Ga 69.72
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33 Germanium 32 Ge 72.59
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34 Arsenic 33 As 74.99
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35 Selenium 34 Se 78.96
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36 Bromine 35 Br 79.91
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37 Krypton 36 Kr 83.8
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38 Rubidium 37 Rb 85.47
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39 Strontium 38 Sr 87.62
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40 Yttrium 39 Y 88.91
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41 Zirconium 40 Zr 91.22
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42 Niobium 41 Nb 92.91
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43 Molybdenum 42 Mo 95.94
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44 Technetium 43 Tc 96.91
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45 Ruthenium 44 Ru 101.07
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46 Rhodium 45 Rh 102.9
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47 Palladium 46 Pd 106.4
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48 Silver 47 Ag 107.87
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49 Cadmium 48 Cd 112.4
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50 Indium 49 In 114.82
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51 Tin 50 Sn 118.69
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52 Antimony 51 Sb 121.75
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53 Tellurium 52 Te 127.6
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54 Iodine 53 I 126.9
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55 Xenon 54 Xe 131.3
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56 Cesium 55 Cs 132.9
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57 Barium 56 Ba 137.34
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58 Lanthanum 57 La 138.91
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59 Cerium 58 Ce 140.12
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60 Praseodymium 59 Pr 140.91
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61 Neodymium 60 Nd 144.24
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62 Promethium 61 Pm 144.91
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63 Samarium 62 Sm 150.35
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64 Europium 63 Eu 151.96
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65 Gadolinium 64 Gd 157.25
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66 Terbium 65 Tb 158.92
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67 Dysprosium 66 Dy 162.5
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68 Holmium 67 Ho 164.93
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69 Erbium 68 Er 167.26
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70 Thulium 69 Tm 168.93
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71 Ytterbium 70 Yb 173.04
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72 Lutetium 71 Lu 174.97
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73 Hafnium 72 Hf 178.49
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74 Tantalum 73 Ta 180.95
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75 Wolfram 74 W 183.85
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76 Rhenium 75 Re 186.2
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77 Osmium 76 Os 190.2
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78 Iridium 77 Ir 192.22
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79 Platinum 78 Pt 195.09
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80 Gold 79 Au 196.97
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81 Mercury 80 Hg 200.59
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82 Thallium 81 Tl 204.37
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83 Lead 82 Pb 207.19
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84 Bismuth 83 Bi 208.98
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85 Polonium 84 Po 208.98
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86 Astatine 85 At 209.99
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87 Radon 86 Rn 222.02
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88 Francium 87 Fr 223.02
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89 Radium 88 Ra 226
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90 Actinium 89 Ac 227.03
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91 Thorium 90 Th 232.04
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92 Protactinium 91 Pa 231.04
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93 Uranium 92 U 238.03
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94 Neptunium 93 Np 237
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95 Plutonium 94 Pu 242
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96 Americium 95 Am 243.06
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97 Curium 96 Cm 247.07
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98 Berkelium 97 Bk 247.07
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99 Californium 98 Cf 251.08
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100 Einsteinium 99 Es 254.09
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101 Fermium 100 Fm 257.1
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102 Mendelevium 101 Md 257.1
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103 Nobelium 102 No 255.09
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104 Lawrencium 103 Lr 256.1
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