Atomic Masses of the Elements
| Element |
Symbol |
At. No. |
At. Mass |
M.P., oC |
B.P., oC |
| Actinium |
Ac |
89 |
227.028 |
1050 |
3200±300 |
| Aluminum |
Al |
13 |
26.981539(5) |
660.37 |
2467 |
| Americium |
Am |
95 |
243 |
994±4 |
2607 |
| Antimony |
Sb |
51 |
121.757 |
630.74 |
1750 |
| Argon |
Ar |
18 |
39.948(1) |
-189.2 |
-185.7 |
| Arsenic |
As |
33 |
74.92159(2) |
817 (28 atm) |
613(sublimes) |
| Astatine |
At |
85 |
210 |
302 |
337 |
| Barium |
Ba |
56 |
137.327(7) |
725 |
1640 |
| Berkelium |
Bk |
97 |
247 |
|
|
| Beryllium |
Be |
4 |
9.012182(3) |
1278±5 |
2970(5 torr) |
| Bismuth |
Bi |
83 |
208.98037(3) |
271.3 |
1560±5 |
| Bohrium |
Bh |
107 |
262 |
2079 |
2550(sublimes) |
| Boron |
B |
5 |
10.811(5) |
-7.2 |
58.78 |
| Bromine |
Br |
35 |
79.904 |
320.9 |
765 |
| Cadmium |
Cd |
48 |
112.411(8) |
28.40±0.01 |
669.3 |
| Calcium |
Ca |
20 |
40.078(9) |
839±2 |
1484 |
| Californium |
Cf |
98 |
251 |
|
|
| Carbon |
C |
6 |
12.011(1) |
3652(sublimes) |
|
| Cerium |
Ce |
58 |
140.115(4) |
798 |
3443 |
| Cesium |
Cs |
55 |
132.90543(5) |
28.40±0.01 |
669.3 |
| Chlorine |
Cl |
17 |
35.4527(9) |
-100.98 |
-34.6 |
| Chromium |
Cr |
24 |
51.9961(6) |
1857±20 |
2672 |
| Cobalt |
Co |
27 |
58.93320(1) |
1495 |
2870 |
| Copper |
Cu |
29 |
63.546(3) |
1083.4±0.2 |
2567 |
| Curium |
Cm |
96 |
247 |
1340±40 |
|
| Dubnium |
Db |
105 |
262 |
|
|
| Dysprosium |
Dy |
66 |
162.50(3) |
1412 |
2567 |
| Einsteinium |
Es |
99 |
252 |
|
|
| Erbium |
Er |
68 |
167.26(3) |
1529 |
2868 |
| Europium |
Eu |
63 |
151.965(9) |
822 |
1527 |
| Fermium |
Fm |
100 |
257 |
|
|
| Fluorine |
F |
9 |
18.9984032(9) |
-219.62 |
-188.4 |
| Francium |
Fr |
87 |
223 |
27 |
677 |
| Gadolinium |
Gd |
64 |
157.25(3) |
1313 |
3273 |
| Gallium |
Ga |
31 |
69.723(1) |
29.78 |
2403 |
| Germanium |
Ge |
32 |
72.61(2) |
937.4 |
2830 |
| Gold |
Au |
79 |
196.96654(3) |
1064.434 |
2808±2 |
| Hafnium |
Hf |
72 |
178.49(2) |
2227±20 |
4602 |
| Hassium |
Hs |
108 |
265 |
|
|
| Helium |
He |
2 |
4.002602(2) |
-272.226 amt |
-268.934 |
| Holmium |
Ho |
67 |
164.93032(3) |
1474 |
2700 |
| Hydrogen |
H |
1 |
1.00794(7) |
-259.34 |
-252.87 |
| Indium |
In |
49 |
114.82(1) |
156.61 |
2080 |
| Iodine |
I |
53 |
126.90447(3) |
113.5 |
184.35 |
| Iridium |
Ir |
77 |
192.22(3) |
2410 |
4130 |
| Iron |
Fe |
26 |
55.847(3) |
1535 |
2750 |
| Krypton |
Kr |
36 |
83.80(1) |
-156.6 |
-152.30±0.10 |
| Lanthanum |
La |
57 |
138.9055(2) |
918 |
3464 |
| Lawrencium |
Lr |
103 |
262 |
|
|
| Lead |
Pb |
82 |
207.2(1) |
327.502 |
1740 |
| Lithium |
Li |
3 |
6.941(2) |
180.54 |
1342 |
| Lutetium |
Lu |
71 |
174.967(1) |
1663 |
3402 |
| Magnesium |
Mg |
12 |
24.3050(6) |
648.8±0.5 |
1090 |
| Manganese |
Mn |
25 |
54.93805(1) |
1244±3 |
1962 |
| Meitnerium |
Mt |
109 |
266 |
|
|
| Mendelevium |
Md |
101 |
258 |
|
|
| Mercury |
Hg |
80 |
200.59(3) |
-38.87 |
356.58 |
| Molybdenum |
Mo |
42 |
95.94(1) |
2617 |
4612 |
| Neodymium |
Nd |
60 |
144.24(3) |
1021 |
3074 |
| Neon |
Ne |
10 |
20.1797(6) |
-248.67 |
-246.048 |
| Neptunium |
Np |
93 |
237.048 |
640±1 |
3902 |
| Nickel |
Ni |
28 |
58.6934 |
1453 |
2732 |
| Niobium |
Nb |
41 |
92.90638(2) |
2468±10 |
4742 |
| Nitrogen |
N |
7 |
14.00674(7) |
-209.86 |
-195.8 |
| Nobelium |
No |
102 |
259 |
|
|
| Osmium |
Os |
76 |
190.2(1) |
3045±30 |
5027±100 |
| Oxygen |
O |
8 |
15.9994(3) |
-218.4 |
-182.962 |
| Palladium |
Pd |
46 |
106.42(1) |
1554 |
3140 |
| Phosphorus |
P |
15 |
30.973762(4) |
44.1(white) |
280(white) |
| Platinum |
Pt |
78 |
195.08(3) |
1772 |
3827±100 |
| Plutonium |
Pu |
94 |
244 |
641 |
3232 |
| Polonium |
Po |
84 |
209 |
254 |
962 |
| Potassium |
K |
19 |
39.0983(1) |
63.25 |
759.9 |
| Praseodymium |
Pr |
59 |
140.90765(3) |
931 |
3520 |
| Promethium |
Pm |
61 |
145 |
1042 |
3000(estimate) |
| Protactinium |
Pa |
91 |
231.0359 |
1600 |
|
| Radium |
Ra |
88 |
226.025 |
700 |
1140 |
| Radon |
Rn |
86 |
222 |
-71 |
-61.8 |
| Rhenium |
Re |
75 |
186.207(1) |
3180 |
5627(estimate) |
| Rhodium |
Rh |
45 |
102.90550(3) |
1965±3 |
3727±100 |
| Rubidium |
Rb |
37 |
85.4678(3) |
38.89 |
686 |
| Ruthenium |
Ru |
44 |
101.07(2) |
2310 |
3900 |
| Rutherfordium |
Rf |
104 |
261 |
|
|
| Samarium |
Sm |
62 |
150.36(3) |
1074 |
1794 |
| Scandium |
Sc |
21 |
44.955910(9) |
1541 |
2836 |
| Seaborgium |
Sg |
106 |
263 |
|
|
| Selenium |
Se |
34 |
78.96(3) |
217 |
684.9±1.0 |
| Silicon |
Si |
14 |
28.0855(3) |
1410 |
2355 |
| Silver |
Ag |
47 |
107.8682(2) |
961.93 |
2212 |
| Sodium |
Na |
11 |
22.989768(6) |
97.81±0.03 |
882.9 |
| Strontium |
Sr |
38 |
87.62(1) |
769 |
1384 |
| Sulfur |
S |
16 |
32.066(6) |
112.8 |
444.674 |
| Tantalum |
Ta |
73 |
180.9479(1) |
2996 |
5425±100 |
| Technetium |
Tc |
43 |
98 |
2172 |
4877 |
| Tellurium |
Te |
52 |
127.60(3) |
449.5±0.3 |
989.8±3.8 |
| Terbium |
Tb |
65 |
158.92534(3) |
1356 |
3230 |
| Thallium |
Tl |
81 |
204.3833(2) |
303.5 |
1457±10 |
| Thorium |
Th |
90 |
232.0381(1) |
1750 |
3800(app.) |
| Thulium |
Tm |
69 |
168.93421(3) |
1545 |
1950 |
| Tin |
Sn |
50 |
118.710(7) |
231.9681 |
2270 |
| Titanium |
Ti |
22 |
47.88(3) |
1660±10 |
32878 |
| Tungsten |
W |
74 |
183.85(3) |
3410±20 |
5660 |
| Uranium |
U |
92 |
238.0289(1) |
1132±0.8 |
3818 |
| Vanadium |
V |
23 |
50.9415(1) |
1890±10 |
3380 |
| Xenon |
Xe |
54 |
131.29(2) |
-111.9 |
-107.1±0.3 |
| Ytterbium |
Yb |
70 |
173.04(3) |
819 |
1196 |
| Yttrium |
Y |
39 |
88.90585(2) |
1552 |
5338 |
| Zinc |
Zn |
30 |
65.39(2) |
419.58 |
907 |
| Zirconium |
Zr |
40 |
91.224(2) |
1852±2 |
4377 |