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AtomicNumber | Element | Symbol | AtomicMass | NumberofNeutrons | NumberofProtons | NumberofElectrons | Period | Group | Phase | Radioactive | Natural | Metal | Nonmetal | Metalloid | Type | AtomicRadius | Electronegativity | FirstIonization | Density | MeltingPoint | BoilingPoint | NumberOfIsotopes | Discoverer | Year | SpecificHeat | NumberofShells | NumberofValence | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Hydrogen | H | 1.007 | 0 | 1 | 1 | 1 | 1 | gas | yes | yes | Nonmetal | 0.79 | 2.2 | 13.5984 | 8.99E-05 | 14.175 | 20.28 | 3 | Cavendish | 1766 | 14.304 | 1 | 1 | ||||
2 | Helium | He | 4.002 | 2 | 2 | 2 | 1 | 18 | gas | yes | yes | Noble Gas | 0.49 | 24.5874 | 1.79E-04 | 4.22 | 5 | Janssen | 1868 | 5.193 | 1 | |||||||
3 | Lithium | Li | 6.941 | 4 | 3 | 3 | 2 | 1 | solid | yes | yes | Alkali Metal | 2.1 | 0.98 | 5.3917 | 5.34E-01 | 453.85 | 1615 | 5 | Arfvedson | 1817 | 3.582 | 2 | 1 | ||||
4 | Beryllium | Be | 9.012 | 5 | 4 | 4 | 2 | 2 | solid | yes | yes | Alkaline Earth Metal | 1.4 | 1.57 | 9.3227 | 1.85E+00 | 1560.15 | 2742 | 6 | Vaulquelin | 1798 | 1.825 | 2 | 2 | ||||
5 | Boron | B | 10.811 | 6 | 5 | 5 | 2 | 13 | solid | yes | yes | Metalloid | 1.2 | 2.04 | 8.298 | 2.34E+00 | 2573.15 | 4200 | 6 | Gay-Lussac | 1808 | 1.026 | 2 | 3 | ||||
6 | Carbon | C | 12.011 | 6 | 6 | 6 | 2 | 14 | solid | yes | yes | Nonmetal | 0.91 | 2.55 | 11.2603 | 2.27E+00 | 3948.15 | 4300 | 7 | Prehistoric | 0.709 | 2 | 4 | |||||
7 | Nitrogen | N | 14.007 | 7 | 7 | 7 | 2 | 15 | gas | yes | yes | Nonmetal | 0.75 | 3.04 | 14.5341 | 1.25E-03 | 63.29 | 77.36 | 8 | Rutherford | 1772 | 1.04 | 2 | 5 | ||||
8 | Oxygen | O | 15.999 | 8 | 8 | 8 | 2 | 16 | gas | yes | yes | Nonmetal | 0.65 | 3.44 | 13.6181 | 1.43E-03 | 50.5 | 90.2 | 8 | Priestley/Scheele | 1774 | 0.918 | 2 | 6 | ||||
9 | Fluorine | F | 18.998 | 10 | 9 | 9 | 2 | 17 | gas | yes | yes | Halogen | 0.57 | 3.98 | 17.4228 | 1.70E-03 | 53.63 | 85.03 | 6 | Moissan | 1886 | 0.824 | 2 | 7 | ||||
10 | Neon | Ne | 20.18 | 10 | 10 | 10 | 2 | 18 | gas | yes | yes | Noble Gas | 0.51 | 21.5645 | 9.00E-04 | 24.703 | 27.07 | 8 | Ramsay and Travers | 1898 | 1.03 | 2 | 8 | |||||
11 | Sodium | Na | 22.99 | 12 | 11 | 11 | 3 | 1 | solid | yes | yes | Alkali Metal | 2.2 | 0.93 | 5.1391 | 9.71E-01 | 371.15 | 1156 | 7 | Davy | 1807 | 1.228 | 3 | 1 | ||||
12 | Magnesium | Mg | 24.305 | 12 | 12 | 12 | 3 | 2 | solid | yes | yes | Alkaline Earth Metal | 1.7 | 1.31 | 7.6462 | 1.74E+00 | 923.15 | 1363 | 8 | Black | 1755 | 1.023 | 3 | 2 | ||||
13 | Aluminum | Al | 26.982 | 14 | 13 | 13 | 3 | 13 | solid | yes | yes | Metal | 1.8 | 1.61 | 5.9858 | 2.70E+00 | 933.4 | 2792 | 8 | Wshler | 1827 | 0.897 | 3 | 3 | ||||
14 | Silicon | Si | 28.086 | 14 | 14 | 14 | 3 | 14 | solid | yes | yes | Metalloid | 1.5 | 1.9 | 8.1517 | 2.33E+00 | 1683.15 | 3538 | 8 | Berzelius | 1824 | 0.705 | 3 | 4 | ||||
15 | Phosphorus | P | 30.974 | 16 | 15 | 15 | 3 | 15 | solid | yes | yes | Nonmetal | 1.2 | 2.19 | 10.4867 | 1.82E+00 | 317.25 | 553 | 7 | BranBrand | 1669 | 0.769 | 3 | 5 | ||||
16 | Sulfur | S | 32.065 | 16 | 16 | 16 | 3 | 16 | solid | yes | yes | Nonmetal | 1.1 | 2.58 | 10.36 | 2.07E+00 | 388.51 | 717.8 | 10 | Prehistoric | 0.71 | 3 | 6 | |||||
17 | Chlorine | Cl | 35.453 | 18 | 17 | 17 | 3 | 17 | gas | yes | yes | Halogen | 0.97 | 3.16 | 12.9676 | 3.21E-03 | 172.31 | 239.11 | 11 | Scheele | 1774 | 0.479 | 3 | 7 | ||||
18 | Argon | Ar | 39.948 | 22 | 18 | 18 | 3 | 18 | gas | yes | yes | Noble Gas | 0.88 | 15.7596 | 1.78E-03 | 83.96 | 87.3 | 8 | Rayleigh and Ramsay | 1894 | 0.52 | 3 | 8 | |||||
19 | Potassium | K | 39.098 | 20 | 19 | 19 | 4 | 1 | solid | yes | yes | Alkali Metal | 2.8 | 0.82 | 4.3407 | 8.62E-01 | 336.5 | 1032 | 10 | Davy | 1807 | 0.757 | 4 | 1 | ||||
20 | Calcium | Ca | 40.078 | 20 | 20 | 20 | 4 | 2 | solid | yes | yes | Alkaline Earth Metal | 2.2 | 1 | 6.1132 | 1.54E+00 | 1112.15 | 1757 | 14 | Davy | 1808 | 0.647 | 4 | 2 | ||||
21 | Scandium | Sc | 44.956 | 24 | 21 | 21 | 4 | 3 | solid | yes | yes | Transition Metal | 2.1 | 1.36 | 6.5615 | 2.99E+00 | 1812.15 | 3109 | 15 | Nilson | 1878 | 0.568 | 4 | |||||
22 | Titanium | Ti | 47.867 | 26 | 22 | 22 | 4 | 4 | solid | yes | yes | Transition Metal | 2 | 1.54 | 6.8281 | 4.54E+00 | 1933.15 | 3560 | 9 | Gregor | 1791 | 0.523 | 4 | |||||
23 | Vanadium | V | 50.942 | 28 | 23 | 23 | 4 | 5 | solid | yes | yes | Transition Metal | 1.9 | 1.63 | 6.7462 | 6.11E+00 | 2175.15 | 3680 | 9 | del Rio | 1801 | 0.489 | 4 | |||||
24 | Chromium | Cr | 51.996 | 28 | 24 | 24 | 4 | 6 | solid | yes | yes | Transition Metal | 1.9 | 1.66 | 6.7665 | 7.15E+00 | 2130.15 | 2944 | 9 | Vauquelin | 1797 | 0.449 | 4 | |||||
25 | Manganese | Mn | 54.938 | 30 | 25 | 25 | 4 | 7 | solid | yes | yes | Transition Metal | 1.8 | 1.55 | 7.434 | 7.44E+00 | 1519.15 | 2334 | 11 | Gahn, Scheele | 1774 | 0.479 | 4 | |||||
26 | Iron | Fe | 55.845 | 30 | 26 | 26 | 4 | 8 | solid | yes | yes | Transition Metal | 1.7 | 1.83 | 7.9024 | 7.87E+00 | 1808.15 | 3134 | 10 | Prehistoric | 0.449 | 4 | ||||||
27 | Cobalt | Co | 58.933 | 32 | 27 | 27 | 4 | 9 | solid | yes | yes | Transition Metal | 1.7 | 1.88 | 7.881 | 8.86E+00 | 1768.15 | 3200 | 14 | Brandt | 1735 | 0.421 | 4 | |||||
28 | Nickel | Ni | 58.693 | 31 | 28 | 28 | 4 | 10 | solid | yes | yes | Transition Metal | 1.6 | 1.91 | 7.6398 | 8.91E+00 | 1726.15 | 3186 | 11 | Cronstedt | 1751 | 0.444 | 4 | |||||
29 | Copper | Cu | 63.546 | 35 | 29 | 29 | 4 | 11 | solid | yes | yes | Transition Metal | 1.6 | 1.9 | 7.7264 | 8.96E+00 | 1357.75 | 2835 | 11 | Prehistoric | 0.385 | 4 | ||||||
30 | Zinc | Zn | 65.38 | 35 | 30 | 30 | 4 | 12 | solid | yes | yes | Transition Metal | 1.5 | 1.65 | 9.3942 | 7.13E+00 | 692.88 | 1180 | 15 | Prehistoric | 0.388 | 4 | ||||||
31 | Gallium | Ga | 69.723 | 39 | 31 | 31 | 4 | 13 | solid | yes | yes | Metal | 1.8 | 1.81 | 5.9993 | 5.91E+00 | 302.91 | 2477 | 14 | de Boisbaudran | 1875 | 0.371 | 4 | 3 | ||||
32 | Germanium | Ge | 72.64 | 41 | 32 | 32 | 4 | 14 | solid | yes | yes | Metalloid | 1.5 | 2.01 | 7.8994 | 5.32E+00 | 1211.45 | 3106 | 17 | Winkler | 1886 | 0.32 | 4 | 4 | ||||
33 | Arsenic | As | 74.922 | 42 | 33 | 33 | 4 | 15 | solid | yes | yes | Metalloid | 1.3 | 2.18 | 9.7886 | 5.78E+00 | 1090.15 | 887 | 14 | Albertus Magnus | 1250 | 0.329 | 4 | 5 | ||||
34 | Selenium | Se | 78.96 | 45 | 34 | 34 | 4 | 16 | solid | yes | yes | Nonmetal | 1.2 | 2.55 | 9.7524 | 4.81E+00 | 494.15 | 958 | 20 | Berzelius | 1817 | 0.321 | 4 | 6 | ||||
35 | Bromine | Br | 79.904 | 45 | 35 | 35 | 4 | 17 | liq | yes | yes | Halogen | 1.1 | 2.96 | 11.8138 | 3.12E+00 | 266.05 | 332 | 19 | Balard | 1826 | 0.474 | 4 | 7 | ||||
36 | Krypton | Kr | 83.798 | 48 | 36 | 36 | 4 | 18 | gas | yes | yes | Noble Gas | 1 | 13.9996 | 3.73E-03 | 115.93 | 119.93 | 23 | Ramsay and Travers | 1898 | 0.248 | 4 | 8 | |||||
37 | Rubidium | Rb | 85.468 | 48 | 37 | 37 | 5 | 1 | solid | yes | yes | Alkali Metal | 3 | 0.82 | 4.1771 | 1.53E+00 | 312.79 | 961 | 20 | Bunsen and Kirchoff | 1861 | 0.363 | 5 | 1 | ||||
38 | Strontium | Sr | 87.62 | 50 | 38 | 38 | 5 | 2 | solid | yes | yes | Alkaline Earth Metal | 2.5 | 0.95 | 5.6949 | 2.64E+00 | 1042.15 | 1655 | 18 | Davy | 1808 | 0.301 | 5 | 2 | ||||
39 | Yttrium | Y | 88.906 | 50 | 39 | 39 | 5 | 3 | solid | yes | yes | Transition Metal | 2.3 | 1.22 | 6.2173 | 4.47E+00 | 1799.15 | 3609 | 21 | Gadolin | 1794 | 0.298 | 5 | |||||
40 | Zirconium | Zr | 91.224 | 51 | 40 | 40 | 5 | 4 | solid | yes | yes | Transition Metal | 2.2 | 1.33 | 6.6339 | 6.51E+00 | 2125.15 | 4682 | 20 | Klaproth | 1789 | 0.278 | 5 | |||||
41 | Niobium | Nb | 92.906 | 52 | 41 | 41 | 5 | 5 | solid | yes | yes | Transition Metal | 2.1 | 1.6 | 6.7589 | 8.57E+00 | 2741.15 | 5017 | 24 | Hatchett | 1801 | 0.265 | 5 | |||||
42 | Molybdenum | Mo | 95.96 | 54 | 42 | 42 | 5 | 6 | solid | yes | yes | Transition Metal | 2 | 2.16 | 7.0924 | 1.02E+01 | 2890.15 | 4912 | 20 | Scheele | 1778 | 0.251 | 5 | |||||
43 | Technetium | Tc | 98 | 55 | 43 | 43 | 5 | 7 | artificial | yes | yes | Transition Metal | 2 | 1.9 | 7.28 | 1.15E+01 | 2473.15 | 5150 | 23 | Perrier and Segr� | 1937 | 5 | ||||||
44 | Ruthenium | Ru | 101.07 | 57 | 44 | 44 | 5 | 8 | solid | yes | yes | Transition Metal | 1.9 | 2.2 | 7.3605 | 1.24E+01 | 2523.15 | 4423 | 16 | Klaus | 1844 | 0.238 | 5 | |||||
45 | Rhodium | Rh | 102.906 | 58 | 45 | 45 | 5 | 9 | solid | yes | yes | Transition Metal | 1.8 | 2.28 | 7.4589 | 1.24E+01 | 2239.15 | 3968 | 20 | Wollaston | 1803 | 0.243 | 5 | |||||
46 | Palladium | Pd | 106.42 | 60 | 46 | 46 | 5 | 10 | solid | yes | yes | Transition Metal | 1.8 | 2.2 | 8.3369 | 1.20E+01 | 1825.15 | 3236 | 21 | Wollaston | 1803 | 0.244 | 5 | |||||
47 | Silver | Ag | 107.868 | 61 | 47 | 47 | 5 | 11 | solid | yes | yes | Transition Metal | 1.8 | 1.93 | 7.5762 | 1.05E+01 | 1234.15 | 2435 | 27 | Prehistoric | 0.235 | 5 | ||||||
48 | Cadmium | Cd | 112.411 | 64 | 48 | 48 | 5 | 12 | solid | yes | yes | Transition Metal | 1.7 | 1.69 | 8.9938 | 8.69E+00 | 594.33 | 1040 | 22 | Stromeyer | 1817 | 0.232 | 5 | |||||
49 | Indium | In | 114.818 | 66 | 49 | 49 | 5 | 13 | solid | yes | yes | Metal | 2 | 1.78 | 5.7864 | 7.31E+00 | 429.91 | 2345 | 34 | Reich and Richter | 1863 | 0.233 | 5 | 3 | ||||
50 | Tin | Sn | 118.71 | 69 | 50 | 50 | 5 | 14 | solid | yes | yes | Metal | 1.7 | 1.96 | 7.3439 | 7.29E+00 | 505.21 | 2875 | 28 | Prehistoric | 0.228 | 5 | 4 | |||||
51 | Antimony | Sb | 121.76 | 71 | 51 | 51 | 5 | 15 | solid | yes | yes | Metalloid | 1.5 | 2.05 | 8.6084 | 6.69E+00 | 904.05 | 1860 | 29 | Early historic times | 0.207 | 5 | 5 | |||||
52 | Tellurium | Te | 127.6 | 76 | 52 | 52 | 5 | 16 | solid | yes | yes | Metalloid | 1.4 | 2.1 | 9.0096 | 6.23E+00 | 722.8 | 1261 | 29 | von Reichenstein | 1782 | 0.202 | 5 | 6 | ||||
53 | Iodine | I | 126.904 | 74 | 53 | 53 | 5 | 17 | solid | yes | yes | Halogen | 1.3 | 2.66 | 10.4513 | 4.93E+00 | 386.65 | 457.4 | 24 | Courtois | 1811 | 0.214 | 5 | 7 | ||||
54 | Xenon | Xe | 131.293 | 77 | 54 | 54 | 5 | 18 | gas | yes | yes | Noble Gas | 1.2 | 12.1298 | 5.89E-03 | 161.45 | 165.03 | 31 | Ramsay and Travers | 1898 | 0.158 | 5 | 8 | |||||
55 | Cesium | Cs | 132.905 | 78 | 55 | 55 | 6 | 1 | solid | yes | yes | Alkali Metal | 3.3 | 0.79 | 3.8939 | 1.87E+00 | 301.7 | 944 | 22 | Bunsen and Kirchoff | 1860 | 0.242 | 6 | 1 | ||||
56 | Barium | Ba | 137.327 | 81 | 56 | 56 | 6 | 2 | solid | yes | yes | Alkaline Earth Metal | 2.8 | 0.89 | 5.2117 | 3.59E+00 | 1002.15 | 2170 | 25 | Davy | 1808 | 0.204 | 6 | 2 | ||||
57 | Lanthanum | La | 138.905 | 82 | 57 | 57 | 6 | 3 | solid | yes | yes | Lanthanide | 2.7 | 1.1 | 5.5769 | 6.15E+00 | 1193.15 | 3737 | 19 | Mosander | 1839 | 0.195 | 6 | |||||
58 | Cerium | Ce | 140.116 | 82 | 58 | 58 | 6 | solid | yes | yes | Lanthanide | 2.7 | 1.12 | 5.5387 | 6.77E+00 | 1071.15 | 3716 | 19 | Berzelius | 1803 | 0.192 | 6 | ||||||
59 | Praseodymium | Pr | 140.908 | 82 | 59 | 59 | 6 | solid | yes | yes | Lanthanide | 2.7 | 1.13 | 5.473 | 6.77E+00 | 1204.15 | 3793 | 15 | von Welsbach | 1885 | 0.193 | 6 | ||||||
60 | Neodymium | Nd | 144.242 | 84 | 60 | 60 | 6 | solid | yes | yes | Lanthanide | 2.6 | 1.14 | 5.525 | 7.01E+00 | 1289.15 | 3347 | 16 | von Welsbach | 1885 | 0.19 | 6 | ||||||
61 | Promethium | Pm | 145 | 84 | 61 | 61 | 6 | artificial | yes | yes | Lanthanide | 2.6 | 1.13 | 5.582 | 7.26E+00 | 1204.15 | 3273 | 14 | Marinsky et al. | 1945 | 6 | |||||||
62 | Samarium | Sm | 150.36 | 88 | 62 | 62 | 6 | solid | yes | yes | Lanthanide | 2.6 | 1.17 | 5.6437 | 7.52E+00 | 1345.15 | 2067 | 17 | Boisbaudran | 1879 | 0.197 | 6 | ||||||
63 | Europium | Eu | 151.964 | 89 | 63 | 63 | 6 | solid | yes | yes | Lanthanide | 2.6 | 1.2 | 5.6704 | 5.24E+00 | 1095.15 | 1802 | 21 | Demarcay | 1901 | 0.182 | 6 | ||||||
64 | Gadolinium | Gd | 157.25 | 93 | 64 | 64 | 6 | solid | yes | yes | Lanthanide | 2.5 | 1.2 | 6.1501 | 7.90E+00 | 1585.15 | 3546 | 17 | de Marignac | 1880 | 0.236 | 6 | ||||||
65 | Terbium | Tb | 158.925 | 94 | 65 | 65 | 6 | solid | yes | yes | Lanthanide | 2.5 | 1.2 | 5.8638 | 8.23E+00 | 1630.15 | 3503 | 24 | Mosander | 1843 | 0.182 | 6 | ||||||
66 | Dysprosium | Dy | 162.5 | 97 | 66 | 66 | 6 | solid | yes | yes | Lanthanide | 2.5 | 1.22 | 5.9389 | 8.55E+00 | 1680.15 | 2840 | 21 | de Boisbaudran | 1886 | 0.17 | 6 | ||||||
67 | Holmium | Ho | 164.93 | 98 | 67 | 67 | 6 | solid | yes | yes | Lanthanide | 2.5 | 1.23 | 6.0215 | 8.80E+00 | 1743.15 | 2993 | 29 | Delafontaine and Soret | 1878 | 0.165 | 6 | ||||||
68 | Erbium | Er | 167.259 | 99 | 68 | 68 | 6 | solid | yes | yes | Lanthanide | 2.5 | 1.24 | 6.1077 | 9.07E+00 | 1795.15 | 3503 | 16 | Mosander | 1843 | 0.168 | 6 | ||||||
69 | Thulium | Tm | 168.934 | 100 | 69 | 69 | 6 | solid | yes | yes | Lanthanide | 2.4 | 1.25 | 6.1843 | 9.32E+00 | 1818.15 | 2223 | 18 | Cleve | 1879 | 0.16 | 6 | ||||||
70 | Ytterbium | Yb | 173.054 | 103 | 70 | 70 | 6 | solid | yes | yes | Lanthanide | 2.4 | 1.1 | 6.2542 | 6.97E+00 | 1097.15 | 1469 | 16 | Marignac | 1878 | 0.155 | 6 | ||||||
71 | Lutetium | Lu | 174.967 | 104 | 71 | 71 | 6 | solid | yes | yes | Lanthanide | 2.3 | 1.27 | 5.4259 | 9.84E+00 | 1936.15 | 3675 | 22 | Urbain/ von Welsbach | 1907 | 0.154 | 6 | ||||||
72 | Hafnium | Hf | 178.49 | 106 | 72 | 72 | 6 | 4 | solid | yes | yes | Transition Metal | 2.2 | 1.3 | 6.8251 | 1.33E+01 | 2500.15 | 4876 | 17 | Coster and von Hevesy | 1923 | 0.144 | 6 | |||||
73 | Tantalum | Ta | 180.948 | 108 | 73 | 73 | 6 | 5 | solid | yes | yes | Transition Metal | 2.1 | 1.5 | 7.5496 | 1.67E+01 | 3269.15 | 5731 | 19 | Ekeberg | 1801 | 0.14 | 6 | |||||
74 | Wolfram | W | 183.84 | 110 | 74 | 74 | 6 | 6 | solid | yes | yes | Transition Metal | 2 | 2.36 | 7.864 | 1.93E+01 | 3680.15 | 5828 | 22 | J. and F. d'Elhuyar | 1783 | 0.132 | 6 | |||||
75 | Rhenium | Re | 186.207 | 111 | 75 | 75 | 6 | 7 | solid | yes | yes | Transition Metal | 2 | 1.9 | 7.8335 | 2.10E+01 | 3453.15 | 5869 | 21 | Noddack, Berg, and Tacke | 1925 | 0.137 | 6 | |||||
76 | Osmium | Os | 190.23 | 114 | 76 | 76 | 6 | 8 | solid | yes | yes | Transition Metal | 1.9 | 2.2 | 8.4382 | 2.26E+01 | 3300.15 | 5285 | 19 | Tennant | 1803 | 0.13 | 6 | |||||
77 | Iridium | Ir | 192.217 | 115 | 77 | 77 | 6 | 9 | solid | yes | yes | Transition Metal | 1.9 | 2.2 | 8.967 | 2.26E+01 | 2716.15 | 4701 | 25 | Tennant | 1804 | 0.131 | 6 | |||||
78 | Platinum | Pt | 195.084 | 117 | 78 | 78 | 6 | 10 | solid | yes | yes | Transition Metal | 1.8 | 2.28 | 8.9587 | 2.15E+01 | 2045.15 | 4098 | 32 | Ulloa/Wood | 1735 | 0.133 | 6 | |||||
79 | Gold | Au | 196.967 | 118 | 79 | 79 | 6 | 11 | solid | yes | yes | Transition Metal | 1.8 | 2.54 | 9.2255 | 1.93E+01 | 1337.73 | 3129 | 21 | Prehistoric | 0.129 | 6 | ||||||
80 | Mercury | Hg | 200.59 | 121 | 80 | 80 | 6 | 12 | liq | yes | yes | Transition Metal | 1.8 | 2 | 10.4375 | 1.35E+01 | 234.43 | 630 | 26 | Prehistoric | 0.14 | 6 | ||||||
81 | Thallium | Tl | 204.383 | 123 | 81 | 81 | 6 | 13 | solid | yes | yes | Metal | 2.1 | 2.04 | 6.1082 | 1.19E+01 | 577.15 | 1746 | 28 | Crookes | 1861 | 0.129 | 6 | 3 | ||||
82 | Lead | Pb | 207.2 | 125 | 82 | 82 | 6 | 14 | solid | yes | yes | Metal | 1.8 | 2.33 | 7.4167 | 1.13E+01 | 600.75 | 2022 | 29 | Prehistoric | 0.129 | 6 | 4 | |||||
83 | Bismuth | Bi | 208.98 | 126 | 83 | 83 | 6 | 15 | solid | yes | yes | Metal | 1.6 | 2.02 | 7.2856 | 9.81E+00 | 544.67 | 1837 | 19 | Geoffroy the Younger | 1753 | 0.122 | 6 | 5 | ||||
84 | Polonium | Po | 210 | 126 | 84 | 84 | 6 | 16 | solid | yes | yes | yes | Metalloid | 1.5 | 2 | 8.417 | 9.32E+00 | 527.15 | 1235 | 34 | Curie | 1898 | 6 | 6 | ||||
85 | Astatine | At | 210 | 125 | 85 | 85 | 6 | 17 | solid | yes | yes | yes | Noble Gas | 1.4 | 2.2 | 9.3 | 7.00E+00 | 575.15 | 610 | 21 | Corson et al. | 1940 | 6 | 7 | ||||
86 | Radon | Rn | 222 | 136 | 86 | 86 | 6 | 18 | gas | yes | yes | yes | Alkali Metal | 1.3 | 10.7485 | 9.73E-03 | 202.15 | 211.3 | 20 | Dorn | 1900 | 0.094 | 6 | 8 | ||||
87 | Francium | Fr | 223 | 136 | 87 | 87 | 7 | 1 | solid | yes | yes | yes | Alkaline Earth Metal | 0.7 | 4.0727 | 1.87E+00 | 300.15 | 950 | 21 | Perey | 1939 | 7 | 1 | |||||
88 | Radium | Ra | 226 | 138 | 88 | 88 | 7 | 2 | solid | yes | yes | yes | Actinide | 0.9 | 5.2784 | 5.50E+00 | 973.15 | 2010 | 15 | Pierre and Marie Curie | 1898 | 7 | 2 | |||||
89 | Actinium | Ac | 227 | 138 | 89 | 89 | 7 | 3 | solid | yes | yes | yes | Actinide | 1.1 | 5.17 | 1.01E+01 | 1323.15 | 3471 | 11 | Debierne/Giesel | 1899 | 0.12 | 7 | |||||
90 | Thorium | Th | 232.038 | 142 | 90 | 90 | 7 | solid | yes | yes | yes | Actinide | 1.3 | 6.3067 | 1.17E+01 | 2028.15 | 5061 | 12 | Berzelius | 1828 | 0.113 | 7 | ||||||
91 | Protactinium | Pa | 231.036 | 140 | 91 | 91 | 7 | solid | yes | yes | yes | Actinide | 1.5 | 5.89 | 1.54E+01 | 1873.15 | 4300 | 14 | Hahn and Meitner | 1917 | 7 | |||||||
92 | Uranium | U | 238.029 | 146 | 92 | 92 | 7 | solid | yes | yes | yes | Actinide | 1.38 | 6.1941 | 1.90E+01 | 1405.15 | 4404 | 15 | Peligot | 1841 | 0.116 | 7 | ||||||
93 | Neptunium | Np | 237 | 144 | 93 | 93 | 7 | artificial | yes | yes | Actinide | 1.36 | 6.2657 | 2.05E+01 | 913.15 | 4273 | 153 | McMillan and Abelson | 1940 | 7 | ||||||||
94 | Plutonium | Pu | 244 | 150 | 94 | 94 | 7 | artificial | yes | yes | Actinide | 1.28 | 6.0262 | 1.98E+01 | 913.15 | 3501 | 163 | Seaborg et al. | 1940 | 7 | ||||||||
95 | Americium | Am | 243 | 148 | 95 | 95 | 7 | artificial | yes | yes | Actinide | 1.3 | 5.9738 | 1.37E+01 | 1267.15 | 2880 | 133 | Seaborg et al. | 1944 | 7 | ||||||||
96 | Curium | Cm | 247 | 151 | 96 | 96 | 7 | artificial | yes | yes | Actinide | 1.3 | 5.9915 | 1.35E+01 | 1340.15 | 3383 | 133 | Seaborg et al. | 1944 | 7 | ||||||||
97 | Berkelium | Bk | 247 | 150 | 97 | 97 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.1979 | 1.48E+01 | 1259.15 | 983 | 83 | Seaborg et al. | 1949 | 7 | ||||||||
98 | Californium | Cf | 251 | 153 | 98 | 98 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.2817 | 1.51E+01 | 1925.15 | 1173 | 123 | Seaborg et al. | 1950 | 7 | ||||||||
99 | Einsteinium | Es | 252 | 153 | 99 | 99 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.42 | 1.35E+01 | 1133.15 | 123 | Ghiorso et al. | 1952 | 7 | |||||||||
100 | Fermium | Fm | 257 | 157 | 100 | 100 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.5 | 103 | Ghiorso et al. | 1953 | 7 | |||||||||||
101 | Mendelevium | Md | 258 | 157 | 101 | 101 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.58 | 33 | Ghiorso et al. | 1955 | 7 | |||||||||||
102 | Nobelium | No | 259 | 157 | 102 | 102 | 7 | artificial | yes | yes | Actinide | 1.3 | 6.65 | 73 | Ghiorso et al. | 1958 | 7 | |||||||||||
103 | Lawrencium | Lr | 262 | 159 | 103 | 103 | 7 | artificial | yes | yes | Actinide | 203 | Ghiorso et al. | 1961 | 7 | |||||||||||||
104 | Rutherfordium | Rf | 261 | 157 | 104 | 104 | 7 | 4 | artificial | yes | yes | Transactinide | 1.81E+01 | Ghiorso et al. | 1969 | 7 | ||||||||||||
105 | Dubnium | Db | 262 | 157 | 105 | 105 | 7 | 5 | artificial | yes | yes | Transactinide | 3.90E+01 | Ghiorso et al. | 1970 | 7 | ||||||||||||
106 | Seaborgium | Sg | 266 | 160 | 106 | 106 | 7 | 6 | artificial | yes | yes | Transactinide | 3.50E+01 | Ghiorso et al. | 1974 | 7 | ||||||||||||
107 | Bohrium | Bh | 264 | 157 | 107 | 107 | 7 | 7 | artificial | yes | yes | Transactinide | 3.70E+01 | Armbruster and M�nzenberg | 1981 | 7 | ||||||||||||
108 | Hassium | Hs | 267 | 159 | 108 | 108 | 7 | 8 | artificial | yes | yes | Transactinide | 4.10E+01 | Armbruster and M�nzenberg | 1983 | 7 | ||||||||||||
109 | Meitnerium | Mt | 268 | 159 | 109 | 109 | 7 | 9 | artificial | yes | yes | Transactinide | 3.50E+01 | GSI, Darmstadt, West Germany | 1982 | 7 | ||||||||||||
110 | Darmstadtium | Ds | 271 | 161 | 110 | 110 | 7 | 10 | artificial | yes | yes | Transactinide | 1994 | 7 | ||||||||||||||
111 | Roentgenium | Rg | 272 | 161 | 111 | 111 | 7 | 11 | artificial | yes | yes | Transactinide | 1994 | 7 | ||||||||||||||
112 | Copernicium | Cn | 285 | 173 | 112 | 112 | 7 | 12 | artificial | yes | yes | Transactinide | 1996 | 7 | ||||||||||||||
113 | Nihonium | Nh | 284 | 171 | 113 | 113 | 7 | 13 | artificial | yes | yes | 2004 | 7 | 3 | ||||||||||||||
114 | Flerovium | Fl | 289 | 175 | 114 | 114 | 7 | 14 | artificial | yes | yes | Transactinide | 1999 | 7 | 4 | |||||||||||||
115 | Moscovium | Mc | 288 | 173 | 115 | 115 | 7 | 15 | artificial | yes | yes | 2010 | 7 | 5 | ||||||||||||||
116 | Livermorium | Lv | 292 | 176 | 116 | 116 | 7 | 16 | artificial | yes | yes | Transactinide | 2000 | 7 | 6 | |||||||||||||
117 | Tennessine | Ts | 295 | 178 | 117 | 117 | 7 | 17 | artificial | yes | yes | 2010 | 7 | 7 | ||||||||||||||
118 | Oganesson | Og | 294 | 176 | 118 | 118 | 7 | 18 | artificial | yes | yes | Noble Gas | 2006 | 7 | 8 |
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Where did the electronegativity of thallium (81) being 2.04 come from? WebElements tells me it's 1.62 for Pauling?