ALKALI METALS
Physical Properties
| Electron Configuration |
Atomic Radius (pm) |
Ionic Radius (pm) |
First Ionization Energy (kJ/mol) |
Density (g/cm3) |
Melting Point ( oC) |
|
| H | 1s1 | 37 | 35 |
1312 | 0.0899 | -259.0 |
| Li | 1s22s1 | 152 | 68 | 520 | 0.53 | 180 |
| Na | 1s22s22p63s1 | 186 | 97 | 496 | 0.97 | 98 |
| K | 1s22s22p63s23p64s1 | 227 | 133 | 419 | 0.86 | 64 |
| Rb | 1s22s22p63s23p64s23d104p65s1 | 248 | 147 | 403 | 1.53 | 39 |
| Cs | 1s22s22p63s23p64s23d104p65s24d105p66s1 | 265 | 167 | 376 | 1.87 | 28 |