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calcium (Q706)

From Wikidata
chemical element with symbol Ca and atomic number 20
  • element 20
  • Ca
  • 20Ca
Language Label Description Also known as
default for all languages
No label defined
  • Ca
English
calcium
chemical element with symbol Ca and atomic number 20
  • element 20
  • Ca
  • 20Ca

Statements

subclass of
alkaline earth metal
0 references
light metal
0 references
s-block
0 references
time of discovery or invention
1808
0 references
atomic number
20
0 references
electron configuration
[Ar] 4s²
0 references
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
0 references
ionization energy
6.113154921±0.0000000005 electronvolt
series ordinal
1
1 reference
reference URL
https://physics.nist.gov/asd
title
NIST Atomic Spectra Database, Ionization Energies (English)
retrieved
18 September 2026
11.871719±0.000004 electronvolt
series ordinal
2
1 reference
reference URL
https://physics.nist.gov/asd
title
NIST Atomic Spectra Database, Ionization Energies (English)
retrieved
18 September 2026
50.91316±0.00025 electronvolt
series ordinal
3
1 reference
reference URL
https://physics.nist.gov/asd
title
NIST Atomic Spectra Database, Ionization Energies (English)
retrieved
18 September 2026
electrical conductivity
28,200,000 ampere per volt metre
temperature
25 degree Celsius
1 reference
reference URL
https://www.thebalance.com/electrical-conductivity-in-metals-2340117
retrieved
30 January 2019
specific heat capacity
647.3 joule per kilogram kelvin
1 reference
ISBN-10
3-7776-0736-3
standard enthalpy of formation
177.8 kilojoule per mole
state of matter
gas
1 reference
ISBN-10
0-89116-758-7
7.79 kilojoule per mole
state of matter
liquid
1 reference
ISBN-13
978-1-56396-820-4
melting point
838.85 degree Celsius
0 references
boiling point
1,483.85 degree Celsius
0 references
linear thermal expansion coefficient
22.27 micrometre per metre kelvin
temperature
20 degree Celsius
1 reference
ISBN-13
978-1-62708-155-9
found in taxon
schematic
Electron shell 020 Calcium - no label.svg
1,400 × 1,400; 3 KB
0 references
Commons gallery
Calcium
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Commons category
Calcium
0 references
atomic radius
180 picometre
1 reference
DOI
10.1063/1.1725697
retrieved
3 October 2026
covalent radius
176 picometre
1 reference
DOI
10.1039/B801115J
retrieved
3 October 2026

Identifiers

J9U entity ID
987007293780405171
subject named as (monolingual text)
Calcium (English)
סידן (Hebrew)
الكالسيوم (Arabic)
1 reference
stated in
National Library of Israel
NDL Authority ID
00565069
0 references
NL CR AUT ID
ph116664
subject named as
vápník
0 references
Reaxys registry number
4241647
0 references
Gmelin number
16277
0 references
COD ID
9011033
0 references
ICSC ID
1192
0 references
CAMEO Chemicals ID
309
0 references
ZVG number
8160
0 references
HSDB ID
273
1 reference
stated in
Hazardous Substances Data Bank
HSDB ID
273
publication date
28 October 2019
title
CALCIUM, ELEMENTAL (English)
retrieved
10 May 2021
AGROVOC ID
c_1196
0 references
KEGG ID
C00076
0 references
Arabic Ontology lexical concept ID
151078440
subject named as
calcium | Ca | atomic number 20
scope note
a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals (English)
0 references
HCIS ID
796
0 references
KBpedia ID
Calcium
1 reference
stated in
KBpedia
retrieved
9 July 2020
Lex ID
calcium
0 references
NALT ID
6421
0 references
Namuwiki ID
칼슘
0 references
NE.se ID
kalcium
0 references
PM20 ware ID
143056
subject named as
Kalzium, Kalziumverbindungen
0 references
PSH ID
5752
0 references
Quora topic ID
Calcium
0 references
RationalWiki ID
Calcium
0 references
Treccani ID
calcio
subject named as
calcio
0 references
UNSPSC code
11101511
0 references
USGS Thesaurus ID
1418
0 references
Vikidia article ID
es:Calcio
0 references
eu:Kaltzio
0 references
fr:Calcium
0 references
WikiKids ID
Calcium
MediaWiki page ID
138008
0 references
WordNet 3.1 Synset ID
14656826-n
subject named as
calcium, Ca, atomic number 20
scope note
a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals (English)
0 references
YSO ID
1852
subject named as (monolingual text)
kalsium (Finnish)
calcium (English)
kalcium (Swedish)
kalsium (Northern Sami)
1 reference
stated in
YSO-Wikidata mapping project
 
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