Calcium
| Latin name | Calcium |
| English name | Calcium |
| chemica symbol | Ca |
| atomic number | 20 |
| relative atomic mass | 40,078 |
| period | 4 |
| group | II.A |
| classification | alkaline earth metals |
| discovery year | 1808 |
| discoverer | H. Davy |
| melting point [°C] | 839 |
| boiling point [°C] | 1484 |
| density [g cm-3] | 1,55 |
| density at melting point [g cm-3] | 1,378 |
| electronegativity [Pauling] | 1,0 |
| oxidation states | II |
| electron configuration | [Ar]4s2 |
| specific heat [J g-1K-1] | 0,63 |
| heat of fusion [kJ mol-1] | 8,54 |
| thermal conductivity [W m-1 K-1] | 201 |
| el. conductivity [S m-1] | 3,13.107 |
| 1. ionizing potential [eV] | 6,1132 |
| 2. ionizing potential [eV] | 11,871 |
| 3. ionizing potential [eV] | 50,908 |
| Mohs hardness | 1,75 |
| Brinell hardness [MPa] | 167 |
| shear modulus [GPa] | 7,4 |
| Young's modulus [GPa] | 20 |
| state at normal conditions | solid |
Resources
- BARTHELMY, David. Mineral Species containing Calcium. In: Mineralogy database [online]. 2010 [cit. 2012-09-02]. Available from: http://webmineral.com/
- JURSÍK, František. Anorganická chemie kovů. 1. vyd. Praha: Vysoká škola chemicko-technologická, 2002. ISBN 80-7080-504-8.
- MELLOR, Joseph. Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 3. Londýn: Longmans, Green & Co., 1923.
- PŘIBIL, Rudolf. Komplexometrie. Praha: SNTL, 1977.
- SÝKORA, Václav. Chemickoanalytické tabulky. Praha: SNTL, 1976.
© 2009-2015 | www.prvky.com | kontakt
