Page 110 - Chemistry - XI

Appendix - II
Appendix - II

Atomic Number and Molar Mass of Some Important Elements

Element Symbol Atomic Molar Mass/ Element Symbol Atomic Molar Mass/
Number (g mol ) Number (g mol )
–1
–1
Actinium Ac 89 227.03 Mercury Hg 80 200.59
Aluminium Al 13 26.98 Molybdenum Mo 42 95.94
Americium Am 95 (243) Neodymium Nd 60 144.24
Antimony Sb 51 121.75 Neon Ne 10 20.18

Argon Ar 18 39.95 Neptunium Np 93 (237.05)
Arsenic As 33 74.92 Nickel Ni 28 58.71

Astatine At 85 210 Niobium Nb 41 92.91
Barium Ba 56 137.34 Nitrogen N 7 14.0067
Berkelium Bk 97 (247) Nobelium No 102 (259)

Beryllium Be 4 9.01 Osmium Os 76 190.2
Bismuth Bi 83 208.98 Oxygen O 8 16.00

Bohrium Bh 107 (264) Palladium Pd 46 106.4
Boron B 5 10.81 Phosphorus P 15 30.97
Bromine Br 35 79.91 Platinum Pt 78 195.09

Cadmium Cd 48 112.40 Plutonium Pu 94 (244)
Caesium Cs 55 132.91 Polonium Po 84 210
Calcium Ca 20 40.08 Potassium K 19 39.10

Californium Cf 98 251.08 Praseodymium Pr 59 140.91
Carbon C 6 12.01 Promethium Pm 61 (145)
Cerium Ce 58 140.12 Protactinium Pa 91 231.04

Chlorine Cl 17 35.45 Radium Ra 88 (226)
Chromium Cr 24 52.00 Radon Rn 86 (222)

Cobalt Co 27 58.93 Rhenium Re 75 186.2
Copper Cu 29 63.54 Rhodium Rh 45 102.91
Curium Cm 96 247.07 Rubidium Rb 37 85.47

Dubnium Db 105 (263) Ruthenium Ru 44 101.07
Dysprosium Dy 66 162.50 Rutherfordium Rf 104 (261)

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