K
Potassium
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K |
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Potassium |
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| Atomic number | 19 |
| Atomic weight | 39.0983 |
| Orbital electronic configuration | (Ar)4s1 |
| First ionization energy (eV) | 4.341 |
| Second ionization energy (eV) | 31.81 |
| Third ionization energy (eV) | 46 |
| Electronegativity (Pauling) | 0.82 |
| Atomic radius (Å) | 2.77 |
| Bonding radius (Å) | 2.03 |
| Oxidation states | 1 |
Properties |
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| Density (g/ml) | 0.86 |
| Melting point (K) | 336.35 |
| Boiling point (K) | 1032 |
| Heat of vaporization (kJ/mol) | 79.870 |
| Heat of fusion (kJ/mol) | 2.334 |
| Specific heat capacity (Jg-1K-1) | 0.75 |
| Crystal structure | cubic, body centered |