Machinery's Handbook, 31st Edition
368 Properties, Treatment, and Testing of Materials THE ELEMENTS, HEAT, MASS, AND WEIGHT Table 1. The Elements — Symbols, Atomic Numbers and Weights, Melting Points
Name of Element
Melting Point, ° C
Name of Element
Melting Point, ° C − 248.67 640 ± 1 2468 ± 10 − 209.86 3045 ± 30 1453 … − 218.4 1554 44.1 1772 63.25 931 ± 4 1080 b 1600 641 254 700 − 71 3180 2310 1539 217 1965 ± 3 38.89 1072 ± 5 1410 961.93
Atomic
Atomic
Sym- bol
Sym- bol
Num.
Weight
Num.
Weight
Actinium Ac Aluminum Al
89 227.028 13 26.9815
1050 660.37 994 ± 4 630.74 − 189.2 817 a
Neon
Ne
10 20.1179 93 237.048 41 92.9064 28 58.69
Neptunium Np Niobium Nb Nickel Ni
Americium Am 95 (243)
Antimony Argon Arsenic Astatine
Sb 51 121.75 A 18 39.948
Nitrogen
N 7 14.0067
Nobelium No 102 Osmium Os
(259) 190.2
As At
33 74.9216 85 (210) 56 137.33 4 9.01218 83 208.980 5 10.81 35 79.904 20 40.08 98 (251) 6 12.011 58 140.12 17 35.453 24 51.996
302 725
76 46 78 94 84
Barium Ba Beryllium Be
Oxygen
O 8 15.9994
Berkelium Bk 97 (247)
… Palladium Pd
106.42 195.08 (244) (209)
Phosphorus
P
15 30.9738
1278 ± 5 271.3 2079 − 7.2 320.9 839 ± 2 3652 c 798 ± 2 − 100.98 1857 ± 20
Bismuth Boron Bromine
Bi B Br
Platinum Pt Plutonium Pu Polonium Po Praseodymium Pr
Cadmium Cd 48 112.41
Potassium K 19 39.0938
Calcium Ca Californium Cf Cerium Ce Cesium Cs Chromium Cr Carbon C Cl
59 140.908
… Promethium Pm 61
(145)
Protactinium Pa
91 231.0359 88 226.025 75 186.207 86 (222) 45 102.906 37 85.4678 21 44.9559 14 28.0855 47 107.868 34 78.96 44 101.07 150.36
Radium Radon
Ra Rn
55 132.9054 28.4 ± 0.01
Chlorine Cobalt Copper
Rhenium Re Rhodium Rh Rubidium Rb
Co 27 58.9332
1495
Cu 29 63.546 1083.4 ± 0.2 Ruthenium Ru
Curium Cm 96 (247) Dysprosium Dy 66 162.5
Samarium Sm 62
1340 ± 40
1409 1522
Scandium Sc
Einsteinium Es Erbium Er
99 (252) 68 167.26
… Selenium Se
Silicon Silver
Si Ag Na
Europium Eu 63 151.96 Fermium Fm 100 (257)
822 ± 5 − 219.62 1311 ± 1 29.78 937.4 1064.434 27 b 2227 ± 20 − 272.2 d
… Sodium
11 22.9898 97.81 ± 0.03
Fluorine
F
9 18.9984 87 (223) 64 157.25 31 69.72 32 72.59 72 178.49 2 4.00260 49 114.82 53 126.905 77 192.22 26 55.847 36 83.80 57 138.906
Strontium Sr
38 16 43 52
87.62 32.06
769 112.8 2996 2172
Sulfur
S
Francium Fr Gadolinium Gd Gallium Ga Germanium Ge Hafnium Hf Helium He Gold
Tantalum Ta Technetium Tc Tellurium Te Terbium Tb Thallium Tl Thorium Th
73 180.9479
(98) 127.60
449.5 ± 0.3 1360 ± 4
Au 79 196.967
65 158.925 81 204.383 90 232.038
303.5 1750
Holmium Ho 67 164.930
1470
Thulium Tm 69 168.934
1545 ± 15 231.9681 1660 ± 10 3410 ± 20
Hydrogen Indium Iodine
H 1 1.00794
Tin
Sn
50 22
118.71 47.88 183.85 (266) (266) (265) (262) (261) (261) 131.29 173.04 65.39 91.224
− 259.14 156.61 113.5 2410 1535 − 156.6 920 ± 5
In
Titanium Ti
I
Tungsten
W 74
Iridium Ir
Unnilhexium Unh 106 Unnilnonium Unn 109 Unniloctium Uno 108 Unnilpentium Unp 105 Unnilseptium Uns 107
… … … … … …
Iron
Fe Kr
Krypton
Lanthanum La
Lawrencium Lw 103 (260)
… Unnilquadium Unq 104
Lead
Pb 82 207.2
327.502 180.54 1656 ± 5 648.8 ± 0.5 1244 ± 2
Lithium Li
3 6.941
Uranium U 92 238.029 1132 ± 0.8
Lutetium Lu 71 174.967 Magnesium Mg 12 24.305 Mendelevium Md 101 (258) Manganese Mn 25 54.9380 Hg 80 200.59 Mercury Molybdenum Mo 42 95.94 Neodymium Nd 60 144.24
Vanadium V 23 50.9415
1890 ± 10 − 111.9 824 ± 5 1523 ± 8 419.58 1852 ± 2
Xenon
Xe
54 70 30 40
Ytterbium Yb
… Yttrium
Y 39 88.9059
Zinc
Zn
− 38.87 2617 1010
Zirconium Zr
a At 28 atm (2.837 MPa). b Approximate. c Sublimates. d At 26 atm (2.635 MPa). Notes: Values in parentheses are atomic weights of the most stable known isotopes. Melting points are at standard pressure except as noted.
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