Kalcio
20
Ca
Grupo
2
Perio
4
Bloko
s
Protonoj
Elektronoj
Neŭtronoj
20
20
20
Ĝeneralaj Propraĵoj
Atoma Nombro
20
Atommaso
40,078
Amasa Nombro
40
Kategorio
Teralkalaj metaloj
Koloro
Arĝento
Radioaktiva
Ne
De la Latina vorto calx, kalko
Kristala Strukturo
Vizaĝo Centrita Kubo
Historio
Calcium was known as early as the first century when the Ancient Romans prepared lime as calcium oxide.
Calcium was first isolated by Sir Humphry Davy in 1808 when he electrolyzed a mixture of lime and mercuric oxide.
Davy was trying to isolate calcium; when he heard that Jöns Jakob Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, he tried it himself.
Calcium was first isolated by Sir Humphry Davy in 1808 when he electrolyzed a mixture of lime and mercuric oxide.
Davy was trying to isolate calcium; when he heard that Jöns Jakob Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, he tried it himself.
Elektronoj per ŝelo
2, 8, 8, 2
Elektrona Agordo
[Ar] 4s2
The shell of an egg is made up of primarily calcium carbonate
Fizikaj Propraĵoj
Fazo
Solido
Denso
1,54 g/cm3
Fandpunkto
1115,15 K | 842 °C | 1547,6 °F
Bolpunkto
1757,15 K | 1484 °C | 2703,2 °F
Varmo de Fuzio
8,54 kJ/mol
Varmo de Vaporiĝo
155 kJ/mol
Specifa Varmo Kapacito
0,647 J/g·K
Krusta Abundo
5%
Universa Abundo
0,007%
Bildaj kreditoj: Wikimedia Commons (Matthias Zepper)
Pure calcium in a protective argon gas atmosphere
CAS Nombro
7440-70-2
PubChem Kunmetita Identiga Nombro
5460341
Atomaj Propraĵoj
Atoma Radiuso
197 pm
Kovalenta Radiuso
176 pm
Elektronegativeco
1,00 (Pauling-skalo)
Potencialo de jonigo
6,1132 eV
Atoma Volumo
29,9 cm3/mol
Termika Kondukto
2,01 W/cm·K
Oksidaj Ŝtatoj
1, 2
Aplikoj
Calcium is used to remove oxygen, sulfur and carbon from alloys.
It is also used as an alloying agent used in the production of aluminum, beryllium, copper, lead, and magnesium alloys.
Calcium is used as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium.
Calcium carbonate is used in manufacturing cement and mortar, lime and limestone.
It is also used as an alloying agent used in the production of aluminum, beryllium, copper, lead, and magnesium alloys.
Calcium is used as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium.
Calcium carbonate is used in manufacturing cement and mortar, lime and limestone.
Calcium is considered to be non-toxic
Izotopoj
Stabilaj Izotopoj
40Ca, 42Ca, 43Ca, 44Ca, 46CaMalstabilaj Isotopoj
34Ca, 35Ca, 36Ca, 37Ca, 38Ca, 39Ca, 41Ca, 45Ca, 47Ca, 48Ca, 49Ca, 50Ca, 51Ca, 52Ca, 53Ca, 54Ca, 55Ca, 56Ca, 57Ca