ALKALINE EARTH METALS
Physical Properties
| Electron Configuration |
Atomic Radius (pm) |
Ionic Radius (pm) |
First Ionization Energy (kJ/mol) |
Second Ionization Energy (kJ/mol) |
Density (g/cm3) |
Melting Point (C) |
|
| Be | 1s22s2 | 111 | 35 | 899 | 1757 | 1.85 | 1278 |
| Mg | 1s22s22p63s2 | 160 | 66 | 738 | 1451 | 1.74 | 649 |
| Ca | 1s22s22p63s23p64s2 | 197 | 99 | 590 | 1145 | 1.55 | 839 |
| Sr | 1s22s22p63s23p64s23d104p65s2 | 215 | 112 | 550 | 1064 | 2.54 | 768 |
| Ba | 1s22s22p63s23p64s23d104p65s24d105p66s2 | 217 | 134 | 503 | 965 | 3.5 | 725 |