Alkaline Earth Metals are found in minerals within the crust of the earth - Calcium occurs in the mineral calcite in limestone and in dolomite CaCO3.MgCO3.

Characteristic behaviour is that they will react with water and create an alkaline solution. They will react with non-metals to form salts which are white in colour. Group 2 elements are highly reactive and are used, for example in fireworks.

  • Barium compounds flame a pale green
  • Strontium compounds flame crimson
  • Calcium compounds flame a brick red
  • Magnesium compounds create a brilliant white light

Beryllium is dissimilar in behaviour to other Group 2 elements and is unreactive with water and air unless heated to a high temperature.

Elements of the Periodic Table
Elementsort icon Atomic numbersort icon Atomic weightsort icon Boiling pointsort icon Densitysort icon Heat fusionsort icon Heat vapoursort icon Melting pointsort icon Specific heat capacitysort icon Thermal conductivitysort icon
Barium 56 137.34 1913.16° K 3500 kg/m³ 7.66 kJ/mol 149.5 kJ/mol 987.16° K 1.6 W/m/K
Beryllium 4 9.01 3043.16° K 1850 kg/m³ 11.73 kJ/mol 309.46 kJ/mol 1550.16° K 159.13 J/kg/K 25 W/m/K
Calcium 20 40.08 1713.16° K 1550 kg/m³ 8.79 kJ/mol 153.85 kJ/mol 1111.16° K 125.63 J/kg/K 21.8 W/m/K
Magnesium 12 24.31 1380.16° K 1740 kg/m³ 8.96 kJ/mol 136.17 kJ/mol 923.16° K 159.13 J/kg/K 22.4 W/m/K
Radium 88 226 5000 kg/m³ 10.05 kJ/mol 114.74 kJ/mol 973.16° K 0 J/kg/K
Strontium 38 87.62 1653.16° K 2600 kg/m³ 8.79 kJ/mol 141.54 kJ/mol 1041.16° K 4.3 W/m/K
Amazon Books
Image of Mendeleev on the Periodic Law: Selected Writings, 1869-1905
Author: Dmitri Ivanovich Mendeleev
Publisher: Dover Publications Inc. (2005)
Binding: Paperback, 320 pages