Cailciam (Ca)

chemical element with symbol Ca and atomic number 20

Atomic Number	20
Atomic Weight	40.078
Núicléónuimhir	40

Group	2
Period	4
Block	s

prótón	20 p⁺
neodrón	20 n⁰
leictreon	20 e^-

Physical Property

Ga Adamhach	180 pm 270 pm
molar volume	29.9 cm³/mol
covalent radius	171 pm 147 pm 133 pm 170 pm 176 pm
Metallic Radius	174 pm 197 pm
ionic radius	100 pm 106 pm 112 pm 118 pm 123 pm 134 pm
Crystal Radius	114 pm 120 pm 126 pm 132 pm 137 pm 148 pm
Van der Waals radius	240 pm 231 pm 281 pm 231 pm 339.9 pm
dlús	1.54 g/cm³ 1,378 kg/m³

Chemical Property

fuinneamh

proton affinity
electron affinity	0.02455 eV/particle
ionization energy	6.1131552 eV/particle 11.871718 eV/particle 50.91315 eV/particle 67.2732 eV/particle 84.338 eV/particle 108.78 eV/particle 127.2 eV/particle 147.24 eV/particle 188.535 eV/particle 211.2751 eV/particle 591.6 eV/particle 658.24 eV/particle 728.6 eV/particle 817.22 eV/particle 893.98 eV/particle 973.7 eV/particle 1,086.8 eV/particle 1,157.726 eV/particle 5,128.8576 eV/particle 5,469.8614 eV/particle

enthalpy of vaporization	153.6 kJ/mol
enthalpy of fusion	9.2 kJ/mol
eantalpacht chaighdeánach an fhoirmithe	177.8 kJ/mol
leictreon

electron shell	2, 8, 8, 2

Fiúsleictreon	2 ⓘ

cumraíocht leictreon	[Ar] 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Staid ocsaídiúcháine	1, 2
Leictridhiúltacht	6.113 eV/particle 0.1154119 1
Electrophilicity Index	0.7734001442996138 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point	1,757.15 K
Melting Point	1,115.15 K
critical pressure
critical temperature
triple point
appearance
dath	Silver #808090 #3dff00 #3dff00
appearance
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity
Forbairt theirmeach	0.0000223 1/K
molar heat capacity	25.929 J/(mol K)
Specific Heat Capacity	0.647 J/(g⋅K)
Cóimheas saintoilleadh teasa
electrical properties
type	Conductor
electrical conductivity	29 MS/m
Friotachas	0.00000003399999999999 Ω*m
Forsheoltacht
Maighnéadas
type	paramagnetic
So-ghabhálacht mhaighnéadach (Mass)	0.0000000138 m³/Kg
So-ghabhálacht mhaighnéadach (Molar)	0.0000000005531 m³/mol
So-ghabhálacht mhaighnéadach (Volume)	0.00002139
magnetic ordering
Teocht Curie
Néel temperature
struchtúr
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5.58 Å
Lattice Angles	π/2, π/2, π/2
airíonna meicniúla
Cruas	167 MPa 1.75 MPa
Modal toirte	17 GPa
modal fiartha	7.4 GPa
modal Young	20 GPa
Cóimheas Poisson	0.31
luas forleata fuaime	3,810 m/s
aicmiúchán
Category	Alkaline earth metals, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	16
Mendeleev Number	7
Pettifor Number	16
Geochemical Class	major
Goldschmidt classification	litophile

eile

Gas Basicity
polarizability	160.8 ± 4 a₀
C6 Dispersion Coefficient	2,163 a₀ 2,230 a₀
allotrope
Crosghearradh	0.43
Neutron Mass Absorption	0.00037
Uimhir chandamach	1S0
space group	225 (Fm_3m)

Isotopes of Calcium

Stable Isotopes	3
Unstable Isotopes	26
Natural Isotopes	6

³³Ca

Núicléónuimhir	33
neutron number	13
Mais Adamhach Choibhneasta	33.033312 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	+

decay mode	intensity
p (proton emission)

³⁴Ca

Núicléónuimhir	34
neutron number	14
Mais Adamhach Choibhneasta	34.015985 ± 0.000322 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh
Paireacht	+

decay mode	intensity
2p (2-proton emission)

³⁵Ca

Núicléónuimhir	35
neutron number	15
Mais Adamhach Choibhneasta	35.005572 ± 0.000215 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	25.7 ± 0.2 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1985
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	95.8%
2p (2-proton emission)	4.2%

³⁶Ca

Núicléónuimhir	36
neutron number	16
Mais Adamhach Choibhneasta	35.993074388 ± 0.000042941 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	100.9 ± 1.3 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1977
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	51.2%

³⁷Ca

Núicléónuimhir	37
neutron number	17
Mais Adamhach Choibhneasta	36.985897849 ± 0.00000068 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	181 ± 0.9 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1964
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	76.8%

³⁸Ca

Núicléónuimhir	38
neutron number	18
Mais Adamhach Choibhneasta	37.976319223 ± 0.000000208 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	443.7 ± 0.25 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1966
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

³⁹Ca

Núicléónuimhir	39
neutron number	19
Mais Adamhach Choibhneasta	38.970710811 ± 0.00000064 Da
G-fhachtóir	0.68093333333333 ± 0.00010666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	860.3 ± 0.8 ms
Guairne	3/2
nuclear quadrupole moment	0.038 ± 0.003
dáta fionnachtana nó tionscnaimh	1943
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁴⁰Ca

Núicléónuimhir	40
neutron number	20
Mais Adamhach Choibhneasta	39.96259085 ± 0.000000022 Da
G-fhachtóir	0
natural abundance	96.941 ± 0.156
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1922
Paireacht	+

decay mode	intensity
2β⁺ (double β⁺ decay)

⁴¹Ca

Núicléónuimhir	41
neutron number	21
Mais Adamhach Choibhneasta	40.962277905 ± 0.000000147 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	99.4 ± 1.5 ky
Guairne	7/2
nuclear quadrupole moment	-0.0665 ± 0.0018
dáta fionnachtana nó tionscnaimh	1939
Paireacht	-

decay mode	intensity
ϵ (electron capture)	100%

⁴²Ca

Núicléónuimhir	42
neutron number	22
Mais Adamhach Choibhneasta	41.95861778 ± 0.000000159 Da
G-fhachtóir	0
natural abundance	0.647 ± 0.023
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1934
Paireacht	+

⁴³Ca

Núicléónuimhir	43
neutron number	23
Mais Adamhach Choibhneasta	42.958766381 ± 0.000000244 Da
G-fhachtóir	-0.37638 ± 0.000017142857142857
natural abundance	0.135 ± 0.01
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	7/2
nuclear quadrupole moment	-0.0408 ± 0.0008
dáta fionnachtana nó tionscnaimh	1934
Paireacht	-

⁴⁴Ca

Núicléónuimhir	44
neutron number	24
Mais Adamhach Choibhneasta	43.955481489 ± 0.000000348 Da
G-fhachtóir	0
natural abundance	2.086 ± 0.11
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1922
Paireacht	+

⁴⁵Ca

Núicléónuimhir	45
neutron number	25
Mais Adamhach Choibhneasta	44.95618627 ± 0.000000392 Da
G-fhachtóir	-0.37897142857143 ± 0.00037142857142857
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	162.61 ± 0.09 d
Guairne	7/2
nuclear quadrupole moment	0.038 ± 0.012
dáta fionnachtana nó tionscnaimh	1940
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁴⁶Ca

Núicléónuimhir	46
neutron number	26
Mais Adamhach Choibhneasta	45.953687726 ± 0.000002398 Da
G-fhachtóir	0
natural abundance	0.004 ± 0.003
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1938
Paireacht	+

decay mode	intensity
2β⁻ (double β⁻ decay)

⁴⁷Ca

Núicléónuimhir	47
neutron number	27
Mais Adamhach Choibhneasta	46.954541134 ± 0.000002384 Da
G-fhachtóir	-0.40182857142857 ± 0.00031428571428571
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	4.536 ± 0.003 d
Guairne	7/2
nuclear quadrupole moment	0.084 ± 0.006
dáta fionnachtana nó tionscnaimh	1951
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁴⁸Ca

Núicléónuimhir	48
neutron number	28
Mais Adamhach Choibhneasta	47.952522654 ± 0.000000018 Da
G-fhachtóir	0
natural abundance	0.187 ± 0.021
Meath radaighníomhach	☢️ radioactive element
leathré	56 ± 10 Ey
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1938
Paireacht	+

decay mode	intensity
2β⁻ (double β⁻ decay)
β⁻ (β⁻ decay)

⁴⁹Ca

Núicléónuimhir	49
neutron number	29
Mais Adamhach Choibhneasta	48.955662625 ± 0.00000019 Da
G-fhachtóir	-0.91993333333333 ± 0.00053333333333333
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	8.718 ± 0.006 m
Guairne	3/2
nuclear quadrupole moment	-0.036 ± 0.003
dáta fionnachtana nó tionscnaimh	1950
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁵⁰Ca

Núicléónuimhir	50
neutron number	30
Mais Adamhach Choibhneasta	49.957499215 ± 0.0000017 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	13.45 ± 0.05 s
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1964
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁵¹Ca

Núicléónuimhir	51
neutron number	31
Mais Adamhach Choibhneasta	50.960995663 ± 0.00000056 Da
G-fhachtóir	-0.69973333333333 ± 0.00073333333333333
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	10 ± 0.8 s
Guairne	3/2
nuclear quadrupole moment	0.036 ± 0.012
dáta fionnachtana nó tionscnaimh	1980
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁵²Ca

Núicléónuimhir	52
neutron number	32
Mais Adamhach Choibhneasta	51.963213646 ± 0.00000072 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	4.6 ± 0.3 s
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1985
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2%

⁵³Ca

Núicléónuimhir	53
neutron number	33
Mais Adamhach Choibhneasta	52.968451 ± 0.000047 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	461 ± 90 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1983
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	40%

⁵⁴Ca

Núicléónuimhir	54
neutron number	34
Mais Adamhach Choibhneasta	53.972989 ± 0.000052 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	90 ± 6 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1997
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁵Ca

Núicléónuimhir	55
neutron number	35
Mais Adamhach Choibhneasta	54.979978 ± 0.000172 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	22 ± 2 ms
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1997
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁶Ca

Núicléónuimhir	56
neutron number	36
Mais Adamhach Choibhneasta	55.985496 ± 0.000268 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	11 ± 2 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1997
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁷Ca

Núicléónuimhir	57
neutron number	37
Mais Adamhach Choibhneasta	56.992958 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2009
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁸Ca

Núicléónuimhir	58
neutron number	38
Mais Adamhach Choibhneasta	57.998357 ± 0.000537 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2009
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁹Ca

Núicléónuimhir	59
neutron number	39
Mais Adamhach Choibhneasta	59.006237 ± 0.000644 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2018
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁶⁰Ca

Núicléónuimhir	60
neutron number	40
Mais Adamhach Choibhneasta	60.011809 ± 0.000751 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2018
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁶¹Ca

Núicléónuimhir	61
neutron number	41
Mais Adamhach Choibhneasta	61.020408 ± 0.000859 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

stair

fionnachtaí nó aireagóir	Sir Humphrey Davy
áit ar tháinig air/uirthi	England
dáta fionnachtana nó tionscnaimh	1808
Sanasaíocht	Latin: calx, calcis (lime).
pronunciation	KAL-si-em (Béarla)

foinse

Abundance
Abundance in Earth's crust	41,500 mg/kg
natural abundance (aigéan)	412 mg/L
natural abundance (corp an duine)	1.4 %
natural abundance (dreigeoideach)	1.1 %
natural abundance (An Ghrian)	0.007 %
Abundance in Universe	0.007 %

Nuclear Screening Constants

1	s	0.527
2	p	3.9586
2	s	6.2236
3	p	11.3417
3	s	10.3985
4	s	15.602

Cailciam on ChemicalAid

AGROVOC ID	c_1196
Art & Architecture Thesaurus ID	300264232
Australian Educational Vocabulary ID	scot/3064
BNCF Thesaurus ID	8953
Basque Vikidia ID	Kaltzio
Biblioteca Nacional de España ID	XX531346
Bibliothèque nationale de France ID	11976285h
Brockhaus Enzyklopädie online ID	calcium-20
ChEBI ID	22984
ChemSpider ID	4573905
DSSTOX compound identifier	DTXCID40876145
DSSTox substance ID	DTXSID9050484
Den Store Danske ID	calcium
DrugBank ID	01373
ECHA Substance Infocard ID	100.028.344
Encyclopedia of China ID (Second Edition)	203125
Encyclopædia Britannica Online ID	science/calcium
Encyclopædia Britannica Online ID	science/calcium-ion
Encyclopædia Universalis ID	calcium
EuroVoc ID	5304
Freebase ID	/m/025tkqy
French Vikidia ID	Calcium
Golden ID	Calcium-JG5E
Great Russian Encyclopedia Online ID	2037432
HSDB ID	273
ICSC ID	1192
ID GND	4069806-3
ID Gran Enciclopèdia Catalana	0087196
ID Gran Enciclopèdia Catalana	0013023
ID na topaice ar Quora	Calcium
InChI	InChI=1S/Ca
InChIKey	OYPRJOBELJOOCE-UHFFFAOYSA-N
KBpedia ID	Calcium
KEGG ID	C00076
Krugosvet article	nauka_i_tehnika/himiya/KALTSI.html
Latvian National Encyclopedia Online ID	139701
MeSH descriptor ID	D002118
NALT ID	6421
NDF-RT ID	N0000146031
NDL Authority ID	00565069
NE.se ID	kalcium
NKCR AUT ID	ph116664
Namuwiki ID	칼슘
National Library of Israel J9U ID	987007293780405171
New York Times topic ID	subject/calcium
OmegaWiki Defined Meaning	471
OpenAlex ID	C2910173204
OpenAlex ID	C519063684
PSH ID	5752
PatientsLikeMe treatment ID	calcium
Probes And Drugs ID	PD051696
PubChem CID	5460341
RxNorm ID	1895
Spanish Vikidia ID	Calcio
Store medisinske leksikon ID	kalsium
Store medisinske leksikon ID	kalsium_-_fysiologi
Store norske leksikon ID	kalsium
Treccani ID	calcio
UK Archival Thesaurus ID	f2/mt225/4347/702
UK Parliament thesaurus ID	8918
UMLS CUI	C0006675
UNESCO Thesaurus ID	concept4508
UNII	SY7Q814VUP
USGS Thesaurus ID	1418
WordNet 3.1 Synset ID	14656826-n
YSO ID	1852
ZVG number	8160
Zhihu topic ID	19668568
aitheantóir LoC	sh85018768
uimhir CAS	7440-70-2

Cailciam (Ca)

Physical Property

Chemical Property

eile

Isotopes of Calcium

33Ca

34Ca

35Ca

36Ca

37Ca

38Ca

39Ca

40Ca

41Ca

42Ca

43Ca

44Ca

45Ca

46Ca

47Ca

48Ca

49Ca

50Ca

51Ca

52Ca

53Ca

54Ca

55Ca

56Ca

57Ca

58Ca

59Ca

60Ca

61Ca

stair

foinse

Nuclear Screening Constants

³³Ca

³⁴Ca

³⁵Ca

³⁶Ca

³⁷Ca

³⁸Ca

³⁹Ca

⁴⁰Ca

⁴¹Ca

⁴²Ca

⁴³Ca

⁴⁴Ca

⁴⁵Ca

⁴⁶Ca

⁴⁷Ca

⁴⁸Ca

⁴⁹Ca

⁵⁰Ca

⁵¹Ca

⁵²Ca

⁵³Ca

⁵⁴Ca

⁵⁵Ca

⁵⁶Ca

⁵⁷Ca

⁵⁸Ca

⁵⁹Ca

⁶⁰Ca

⁶¹Ca