Page 110 - คู่มือการวิเคราะห์ดินทางเคมีเพื่อประเมินความอุดมสมบูรณ์ของดิน

ห้องสมุดกรมพัฒนาที่ดิน
102

ภำคผนวกที่ 4
น ำหนักอะตอมของธำตุ

International Atomic Weights
Atomic Atomic Atomic Atomic
Element Symbol Element Symbol
number weight number weight
Actinium Ac 89 (227) Mercury Hg 80 200.59
Aluminum Al 13 26.9815 Molybdenum Mo 42 95.94
Americium Am 95 (243) Neodymium Nd 60 144.24
Antimony Sb 51 121.75 Neon Ne 10 20.183
Argon Ar 18 39.948 Neptunium Np 93 (237)
Arsenic As 33 74.9216 Nickle Ni 28 58.70
Astatine At 85 (210) Niobium Nb 41 92.906
Barium Ba 56 137.34 Nitrogen N 7 14.0067
Berkelium Bk 97 (247) Nobelium No 102 (254)
Beryllium Be 4 9.0122 Osmium Os 76 190.2
Bismuth Bi 83 208.980 Oxygen O 8 15.9994
Boron B 5 10.811 Palladium Pd 46 106.4
Bromine Br 35 79.909 Phosphorus P 15 30.9738
Cadmium Cd 48 112.40 Platinum Pt 78 195.09
Calcium Ca 20 40.08 Plutonium Pu 94 (244)
Californium Cf 98 (249) Polonium Po 84 (210)
Carbon C 6 12.01115 Potassium K 19 39.102
Cerium Ce 58 140.12 Praseodymium Pr 59 140.907
Cesium Cs 55 132.905 Promethium Pm 61 (145)
Chlorine Cl 17 35.453 Protactinium Pa 91 (231)
Chromium Cr 24 51.996 Radium Ra 88 (226)
Cobalt Co 27 58.9332 Radon Rn 86 (222)
Copper Cu 29 63.54 Rhenium Re 75 186.2
Curium Cm 96 (245) Rhodium Rh 45 102.905
Dysprosium Dy 66 162.50 Rubidium Rb 37 85.47
Einsteinium Es 99 (254) Ruthenium Ru 44 101.07
Erbium Er 68 167.26 Samarium Sm 62 150.35
Europium Eu 63 151.96 Scandium Sc 21 44.956
Fermium Fm 100 (252) Selenium Se 34 78.96
Fluorine F 9 18.9984 Silicon Si 14 28.086
Francium Fr 87 (223) Silver Ag 47 107.870
Gadolinium Gd 64 157.25 Sodium Na 11 22.9898
Gallium Ga 31 69.72 Strontium Sr 38 87.62
Germanium Ge 32 72.59 Sulfur S 16 32.064
Gold Au 79 196.967 Tantalum Ta 73 180.948
Hafnium Hf 72 178.49 Technetium Tc 43 (99)
Helium He 2 4.0026 Tellurium Te 52 127.60
Holmium Ho 67 164.930 Terbium Tb 65 158.924
Hydrogen H 1 1.00797 Thallium Tl 81 204.37
Indium In 49 114.82 Thorium Th 90 232.038
Iodine I 53 126.9044 Thulium Tm 69 168.934
Iridium Ir 77 192.2 Tin Sn 50 118.69
Iron Fe 26 55.847 Titanium Ti 22 47.90
Krypton Kr 36 83.80 Tungsten W 74 183.85
Lanthanum La 57 138.91 Uranium U 92 238.03
Lawrencium Lw 103 (257) Vanadium V 23 50.942
Lead Pb 82 207.19 Xenon Xe 54 131.30
Lithium Li 3 6.942 Ytterbium Yb 70 173.04
Lutetium Lu 71 174.97 Yttrium Y 39 88.905
Magnesium Mg 12 24.312 Zinc Zn 30 65.37
Manganese Mn 25 54.9380 Zirconium Zr 40 91.22
Mendelevium Mv 101 (256)