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Reference



Alkaline Earth Metals
Chemical Properties, Physical Properties and General Information


Radioactive Material Sign
Radioactive Natural Element
Radioactive Material Sign
Radioactive Synthetic Element
Toxic Material Sign
Toxic Element
Group 2 of the Periodic Table
Name Sym. No. Atomic
Weight
Melting
Point
Boiling
Point
Phase Density Valence
Electrons
Oxidation
States
Beryllium Toxic Element Be 4 9.012182 1287 C 2469 C Solid 1.85 g/cm3 2s2 +2 (amphoteric oxide)
Magnesium Mg 12 24.3050 650 C 1090 C Solid 1.738 g/cm3 3s2 +2 (strongly basic oxide)
Calcium Ca 20 40.078 842 C 1484 C Solid 1.55 g/cm3 4s2 +2 (strongly basic oxide)
Strontium Toxic Element Sr 38 87.62 777 C 1382 C Solid 2.64 g/cm3 5s2 +2 (strongly basic oxide)
Barium Toxic Element Ba 56 137.327 727 C 1897 C Solid 3.51 g/cm3 6s2 +2 (strongly basic oxide)
Radium Toxic Element Radioactive Natural Element Ra 88 226 700 C 1737 C Solid 5.5 g/cm3 7s2 +2 (strongly basic oxide)

Alkaline earth metals: Group 2 of the periodic table, homologous; highly reactive due to two electrons in their outer shell, though not as alkali metals, due to their reactivity not found free in nature, silvery colored, soft, low-density





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