Calcium, Ca
Index
Calcium is a metal in group IIA of the periodic table with atomic number 20, an atomic weight of 40.08, and a density of 1.55 Mg/m3. Its melting point is 838 C, and it boils at 1440 C.

The electronic configuration of Calcium is (Ar)(4s2). Its atomic radius is 0.197 nm.

At room temperature Calcium has a face-centered cubic crystal structure with a = 0.556 nm.

The linear coefficient of thermal expansion is 22.32 m/m/K and the thermal conductivity is 2.01 W/cm/K.