
Block p elements
The p-block runs from group 13 to 18 and includes nonmetals (carbon, nitrogen, oxygen), the metalloids and post-transition metals, and the noble gases. Most of the elements that make up living matter sit here.
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| No. | Symbol | Element | Atomic weight (u) | Density (g/cm³) | Melting point (K) | Boiling point (K) | Electronegativity | Discovered |
|---|---|---|---|---|---|---|---|---|
| 5 | B | Boron | 10.806 | 2.08 | 2349 | 4200 | 2.04 | 1808 |
| 6 | C | Carbon | 12.0096 | 1.821 | - | - | 2.55 | 3750 BC |
| 7 | N | Nitrogen | 14.0064 | 1.251 | 63.15 | 77.355 | 3.04 | 1772 |
| 8 | O | Oxygen | 15.999 | 1.429 | 54.36 | 90.188 | 3.44 | 1774 |
| 9 | F | Fluorine | 18.9984 | 1.696 | 53.48 | 85.03 | 3.98 | 1810 |
| 10 | Ne | Neon | 20.1797 | 0.9002 | 24.56 | 27.104 | - | 1898 |
| 13 | Al | Aluminium | 26.9815 | 2.7 | 933.47 | 2743 | 1.61 | 1824 |
| 14 | Si | Silicon | 28.084 | 2.329 | 1687 | 3538 | 1.9 | 1823 |
| 15 | P | Phosphorus | 30.9738 | 1.823 | - | - | 2.19 | 1669 |
| 16 | S | Sulfur | 32.059 | 2.07 | 388.36 | 717.8 | 2.58 | 2000 BC |
| 17 | Cl | Chlorine | 35.446 | 3.2 | 171.6 | 239.11 | 3.16 | 1774 |
| 18 | Ar | Argon | 39.792 | 1.784 | 83.81 | 87.302 | - | 1894 |
| 31 | Ga | Gallium | 69.7231 | 5.91 | 302.915 | 2673 | 1.81 | 1875 |
| 32 | Ge | Germanium | 72.6308 | 5.323 | 1211.4 | 3106 | 2.01 | 1886 |
| 33 | As | Arsenic | 74.9216 | 5.727 | - | - | 2.18 | 300 |
| 34 | Se | Selenium | 78.9718 | 4.81 | 494 | 958 | 2.55 | 1817 |
| 35 | Br | Bromine | 79.901 | 3.1028 | 265.8 | 332 | 2.96 | 1825 |
| 36 | Kr | Krypton | 83.7982 | 3.749 | 115.78 | 119.93 | 3 | 1898 |
| 49 | In | Indium | 114.818 | 7.31 | 429.749 | 2345 | 1.78 | 1863 |
| 50 | Sn | Tin | 118.711 | 7.365 | 505.08 | 2875 | 1.96 | 3500 BC |
| 51 | Sb | Antimony | 121.76 | 6.697 | 903.78 | 1908 | 2.05 | 850 |
| 52 | Te | Tellurium | 127.603 | 6.24 | 722.66 | 1261 | 2.1 | 1782 |
| 53 | I | Iodine | 126.904 | 4.933 | 386.85 | 457.4 | 2.66 | 1811 |
| 54 | Xe | Xenon | 131.294 | 5.894 | 161.4 | 165.051 | 2.6 | 1898 |
| 81 | Tl | Thallium | 204.382 | 11.85 | 577 | 1746 | 1.62 | 1861 |
| 82 | Pb | Lead | 207.21 | 11.34 | 600.61 | 2022 | 1.87 | 7000 BC |
| 83 | Bi | Bismuth | 208.98 | 9.78 | 544.7 | 1837 | 2.02 | 1753 |
| 84 | Po | Polonium | 209 | 9.196 | 527 | 1235 | 2 | 1898 |
| 85 | At | Astatine | 210 | 6.35 | 575 | 610 | 2.2 | 1940 |
| 86 | Rn | Radon | 222 | 9.73 | 202 | 211.5 | 2.2 | 1899 |
| 113 | Nh | Nihonium | 286 | 16 | 700 | 1430 | - | 2003 |
| 114 | Fl | Flerovium | 289 | 14 | 340 | 420 | - | 1998 |
| 115 | Mc | Moscovium | 288 | 13.5 | 670 | 1400 | - | 2003 |
| 116 | Lv | Livermorium | 293 | 12.9 | 709 | 1085 | - | 2000 |
| 117 | Ts | Tennessine | 294 | 7.17 | 723 | 883 | - | 2009 |
| 118 | Og | Oganesson | 294 | 4.95 | - | 350 | - | 2002 |