List of elements

One-character elements: element atom number atom mass H 1 1 B 5 10.8 C 6 12 N 7 14 O 8 16 F 9 19 P 15 31 S 16 32.1 K 19 39.1 V 23 50.9 Y 39 88.9 I 53 126.9 W 74 183.9 U 92 238

Two-character elements: element atom number atom mass He 2 4 Li 3 6.9 Be 4 9 Ne 10 20.2 Na 11 23 Mg 12 24.3 Al 13 27 Si 14 28.1 Cl 17 35.5 Ar 18 39.9 Ca 20 40.1 Sc 21 45 Ti 22 47.9 Cr 24 52 Mn 25 54.9 Fe 26 55.8 Co 27 58.9 Ni 28 58.7 Cu 29 63.5 Zn 30 65.4 Ga 31 69.7 Ge 32 72.6 As 33 74.9 Se 34 79 Br 35 79.9 Kr 36 83.8 Rb 37 85.5 Sr 38 87.6 Zr 40 91.2 Nb 41 92.9 Mo 42 95.9 Tc 43 97 Ru 44 101.1 Rh 45 102.9 Pd 46 106.4 Ag 47 107.9 Cd 48 112.4 In 49 114.8 Sn 50 118.7 Sb 51 121.8 Te 52 127.6 Xe 54 131.3 Cs 55 132.9

(continued) element atom number atom mass Ba 56 137.3 La 57 138.9 Ce 58 140.1 Pr 59 140.9 Nd 60 144.2 Pm 61 145 Sm 62 150.4 Eu 63 152 Gd 64 157.3 Tb 65 158.9 Dy 66 162.5 Ho 67 164.9 Er 68 167.3 Tm 69 168.9 Yb 70 173 Lu 71 175 Hf 72 178.5 Ta 73 180.9 Re 75 186.2 Os 76 190.2 Ir 77 192.2 Pt 78 195.1 Au 79 197 Hg 80 200.6 Tl 81 204.4 Pb 82 207.2 Bi 83 209 Po 84 209 At 85 210 Rn 86 222 Fr 87 223 Ra 88 226 Ac 89 227 Th 90 232 Pa 91 231 Np 93 237 Pu 94 244 Am 95 243 Cm 96 247 Bk 97 247 Cf 98 251 Es 99 252 Fm 100 257