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Atomic Numbers Weights Melting Temperatures

Engineering Metals and Materials

Atomic Elements Symbols, Atomic Numbers, Weights and Melting Temperature point

Element
Symbol
Atomic
Melting
Point,
°C
Num.
Weight
Actinium
Ac
89
227.028
1050
Aluminum
Al
13
26.9815
660.37
Americium
Am
95
(243)
994 ± 4
Antimony
Sb
51
121.75
630.74
Argon
A
18
39.948
−189.2
Arsenic
As
33
74.9216
8171
Astatine
At
85
(210)
302
Barium
Ba
56
137.33
725
Berkelium
Bk
97
(247)
Beryllium
Be
4
9.01218
1278 ± 5
Bismuth
Bi
83
208.980
271.3
Boron
B
5
10.81
2079
Bromine
Br
35
79.904
−7.2
Cadmium
Cd
48
112.41
320.9
Calcium
Ca
20
40.08
839 ± 2
Californium
Cf
98
(251)
Carbon
C
6
12.011
36523
Cerium
Ce
58
140.12
798 ± 2
Cesium
Cs
55
132.9054
28.4 ± 0.01
Chlorine
Cl
17
35.453
−100.98
Chromium
Cr
24
51.996
1857 ± 20
Cobalt
Co
27
58.9332
1495
Copper
Cu
29
63.546
1083.4 ± 0.2
Curium
Cm
96
(247)
1340 ± 40
Dysprosium
Dy
66
162.5
1409
Einsteinium
Es
99
(252)
Erbium
Er
68
167.26
1522
Europium
Eu
63
151.96
822 ± 5
Fermium
Fm
100
(257)
Fluorine
F
9
18.9984
−219.62
Francium
Fr
87
(223)
Gadolinium
Gd
64
157.25
1311 ± 1
Gallium
Ga
31
69.72
29.78
Germanium
Ge
32
72.59
937.4
Gold
Au
79
196.967
1064.434
Hafnium
Hf
72
178.49
2227 ± 20
Helium
He
2
4.00260
−272.24
Holmium
Ho
67
164.930
1470
Hydrogen
H
1
1.00794
−259.14
Indium
In
49
114.82
156.61
Iodine
I
53
126.905
113.5
Iridium
Ir
77
192.22
2410
Iron
Fe
26
55.847
1535
Krypton
Kr
36
83.80
−156.6
Lanthanum
La
57
138.906
920 ± 5
Lawrencium
Lw
103
(260)
Lead
Pb
82
207.2
327.502
Lithium
Li
3
6.941
180.54
Lutetium
Lu
71
174.967
1656 ± 5
Magnesium
Mg
12
24.305
648.8 ± 0.5
Manganese
Mn
25
54.9380
1244 ± 2
Mendelevium
Md
101
(258)
Mercury
Hg
80
200.59
−38.87
Molybdenum
Mo
42
95.94
2617
Neodymium
Nd
60
144.24
1010
Neon
Ne
10
20.1179
−248.67
Neptunium
Np
93
237.048
640 ± 1
Nickel
Ni
28
58.69
1453
Niobium
Nb
41
92.9064
2468 ± 10
Nitrogen
N
7
14.0067
−209.86
Nobelium
No
102
(259)
Osmium
Os
76
190.2
3045 ± 30
Oxygen
O
8
15.9994
−218.4
Palladium
Pd
46
106.42
1554
Phosphorus
P
15
30.9738
44.1
Platinum
Pt
78
195.08
1772
Plutonium
Pu
94
(244)
641
Polonium
Po
84
(209)
254
Potassium
K
19
39.0938
63.25
Praseodymium
Pr
59
140.908
931 ± 4
Promethium
Pm
61
(145)
10802
Protactinium
Pa
91
231.0359
1600
Radium
Ra
88
226.025
700
Radon
Rn
86
(222)
−71
Rhenium
Re
75
186.207
3180
Rhodium
Rh
45
102.906
1965 ± 3
Rubidium
Rb
37
85.4678
38.89
Ruthenium
Ru
44
101.07
2310
Samarium
Sm
62
150.36
1072 ± 5
Scandium
Sc
21
44.9559
1539
Selenium
Se
34
78.96
217
Silicon
Si
14
28.0855
1410
Silver
Ag
47
107.868
961.93
Sodium
Na
11
22.9898
97.81 ± 0.03
Strontium
Sr
38
87.62
769
Sulfur
S
16
32.06
112.8
Tantalum
Ta
73
180.9479
2996
Technetium
Tc
43
(98)
2172
Tellurium
Te
52
127.60
449.5 ± 0.3
Terbium
Tb
65
158.925
1360 ± 4
Thallium
Tl
81
204.383
303.5
Thorium
Th
90
232.038
1750
Thulium
Tm
69
168.934
1545 ± 15
Tin
Sn
50
118.71
231.9681
Titanium
Ti
22
47.88
1660 ± 10
Tungsten
W
74
183.85
3410 ± 20
Unnilhexium
Unh
106
(266)
Unnilnonium
Unn
109
(266)
Unniloctium
Uno
108
(265)
Unnilpentium
Unp
105
(262)
Unnilquadium
Unq
104
(261)
Unnilseptium
Uns
107
(261)
Uranium
U
92
238.029
1132 ± 0.8
Vanadium
V
23
50.9415
1890 ± 10
Xenon
Xe
54
131.29
−111.9
Ytterbium
Yb
70
173.04
824 ± 5
Yttrium
Y
39
88.9059
1523 ± 8
Zinc
Zn
30
65.39
419.58
Zirconium
Zr
40
91.224
1852 ± 2

1 At 28 atm
b Approximate.
c Sublimates.
d At 26 atm.

Notes: Values in parentheses are atomic weights of the most stable known isotopes. Melting points at standard pressure except as noted.


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