| Symbol |
Ca |
|
| Atomic Number |
20 |
Relative Atomic Mass
12C = 12.0000 |
40.078 |
Atomic Radius
pm |
197 (α-form) |
First Ionisation Energy
kJ mol-1 |
589.7 |
| Electronegativity |
1.00 |
Density
kg m-3 |
1550 [293 K]
1365 [m.p.] |
Molar Volume
cm3 |
25.86 |
Thermal Conductivity
W m-1 K-1 |
200 [300 K] |
Melting Point
K |
1112 |
Boiling Point
K |
1757 |
| Number of Isotopes |
16 |
Ground State Electron
Configuration |
[Ar]4s2 |
| Term Symbol |
1S0 |
| Discovery |
Discovered by Sir H. Davey (London, England) in 1808 |
| Name Derived From |
Latin calx meaning 'lime' |
Name in Other
Languages |
 Croatian | Kalcij |
 Danish | calcium |
 Dutch | calcium |
 Finnish | kalsium |
 French | calcium |
 German | Kalzium |
 Italian | calcio |
 Norwegian | kalsium |
 Portuguese | cálcio |
 Spanish | calcio |
 Swedish | kalcium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
