Physical Properties Of Oxygen Family
PROPERTY | ELEMENT | |||||
O | S | Se | Te | Po | ||
Atomic number | 8 | 16 | 34 | 52 | 84 | |
Atomic mass | 16.00 | 32.06 | 78.96 | 127.60 | 210 | |
Covalent radius/pm | 74 | 103 | 119 | 142 | 168 | |
Ionic radius/pm(M2-) | 140 | 184 | 198 | 221 | 230 | |
First ionization energy kj mol-1 | 1314 | 1000 | 941 | 869 | 813 | |
Second ionization energy kj mol-1 | 3388 | 2251 | 2045 | 1790 | – | |
Electronegativity | 3.5 | 2.5 | 2.4 | 2.1 | 2.0 | |
Density (g/cm3) | 1.32 | 2.06 | 4.19 | 6.25 | – | |
Melting point (K) | 84 | 393 | 490 | 725 | 520 | |
Boiling point | 90 | 718 | 958 | 1260 | 1235 |
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