
Group 2 elements
Group 2 of the periodic table contains these elements: Beryllium, Magnesium, Calcium, Strontium, Barium, Radium.
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| No. | Symbol | Element | Atomic weight (u) | Density (g/cm³) | Melting point (K) | Boiling point (K) | Electronegativity | Discovered |
|---|---|---|---|---|---|---|---|---|
| 4 | Be | Beryllium | 9.01218 | 1.85 | 1560 | 2742 | 1.57 | 1798 |
| 12 | Mg | Magnesium | 24.304 | 1.738 | 923 | 1363 | 1.31 | 1755 |
| 20 | Ca | Calcium | 40.0784 | 1.55 | 1115 | 1757 | 1 | 1808 |
| 38 | Sr | Strontium | 87.621 | 2.64 | 1050 | 1650 | 0.95 | 1787 |
| 56 | Ba | Barium | 137.328 | 3.51 | 1000 | 2118 | 0.89 | 1772 |
| 88 | Ra | Radium | 226 | 5.5 | 1233 | 2010 | 0.9 | 1898 |