كالتىسىي (Ca)

chemical element with symbol Ca and atomic number 20

Atomic Number	20
Atomic Weight	40.078
mass number	40

Group	2
Period	4
Block	s

پروتون	20 p⁺
neutron	20 n⁰
ئېلېكترون	20 e^-

Physical Property

Atomic Radius	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
density	1.54 g/cm³ 1,378 kg/m³

Chemical Property

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ئېنېرگىيە

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
standard enthalpy of formation	177.8 kJ/mol
ئېلېكترون

ئېلېكترون قەۋەت	2, 8, 8, 2

valence electron	2 ⓘ

electron configuration	[Ar] 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

oxidation number	1, 2
electronegativity	6.113 eV/particle 0.1154119 1
Electrophilicity Index	0.7734001442996138 eV/particle
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	1,757.15 K
Melting Point	1,115.15 K
critical pressure
critical temperature
triple point
appearance
color	Black #808090 #3dff00 #3dff00
appearance
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion	0.0000223 1/K
molar heat capacity	25.929 J/(mol K)
Specific Heat Capacity	0.647 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	29 MS/m
electrical resistivity	0.00000003399999999999 Ω*m
superconductivity
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000138 m³/Kg
magnetic susceptibility (Molar)	0.0000000005531 m³/mol
magnetic susceptibility (Volume)	0.00002139
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant	5.58 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness	167 MPa 1.75 MPa
bulk modulus	17 GPa
shear modulus	7.4 GPa
Young's modulus	20 GPa
Poisson's ratio	0.31
speed of sound	3,810 m/s
classification
Category	Actinides, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	16
Mendeleev Number	7
Pettifor Number	16
Geochemical Class	major
Goldschmidt classification	litophile

other

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

Isotopes of Calcium

Stable Isotopes	3
Unstable Isotopes	26
Natural Isotopes	6

³³Ca

mass number	33
neutron number	13
Relative Atomic Mass	33.033312 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	5/2
nuclear quadrupole moment
time of discovery or invention
parity	+

decay mode	intensity
p (proton emission)

³⁴Ca

mass number	34
neutron number	14
Relative Atomic Mass	34.015985 ± 0.000322 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention
parity	+

decay mode	intensity
2p (2-proton emission)

³⁵Ca

mass number	35
neutron number	15
Relative Atomic Mass	35.005572 ± 0.000215 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	25.7 ± 0.2 ms
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1985
parity	+

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

mass number	36
neutron number	16
Relative Atomic Mass	35.993074388 ± 0.000042941 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	100.9 ± 1.3 ms
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1977
parity	+

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

³⁷Ca

mass number	37
neutron number	17
Relative Atomic Mass	36.985897849 ± 0.00000068 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	181 ± 0.9 ms
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1964
parity	+

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

³⁸Ca

mass number	38
neutron number	18
Relative Atomic Mass	37.976319223 ± 0.000000208 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	443.7 ± 0.25 ms
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1966
parity	+

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

³⁹Ca

mass number	39
neutron number	19
Relative Atomic Mass	38.970710811 ± 0.00000064 Da
g-factor	0.68093333333333 ± 0.00010666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	860.3 ± 0.8 ms
spin	3/2
nuclear quadrupole moment	0.038 ± 0.003
time of discovery or invention	1943
parity	+

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

⁴⁰Ca

mass number	40
neutron number	20
Relative Atomic Mass	39.96259085 ± 0.000000022 Da
g-factor	0
natural abundance	96.941 ± 0.156
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1922
parity	+

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

⁴¹Ca

mass number	41
neutron number	21
Relative Atomic Mass	40.962277905 ± 0.000000147 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	99.4 ± 1.5 ky
spin	7/2
nuclear quadrupole moment	-0.0665 ± 0.0018
time of discovery or invention	1939
parity	-

decay mode	intensity
ϵ (electron capture)	100%

⁴²Ca

mass number	42
neutron number	22
Relative Atomic Mass	41.95861778 ± 0.000000159 Da
g-factor	0
natural abundance	0.647 ± 0.023
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1934
parity	+

⁴³Ca

mass number	43
neutron number	23
Relative Atomic Mass	42.958766381 ± 0.000000244 Da
g-factor	-0.37638 ± 0.000017142857142857
natural abundance	0.135 ± 0.01
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	7/2
nuclear quadrupole moment	-0.0408 ± 0.0008
time of discovery or invention	1934
parity	-

⁴⁴Ca

mass number	44
neutron number	24
Relative Atomic Mass	43.955481489 ± 0.000000348 Da
g-factor	0
natural abundance	2.086 ± 0.11
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1922
parity	+

⁴⁵Ca

mass number	45
neutron number	25
Relative Atomic Mass	44.95618627 ± 0.000000392 Da
g-factor	-0.37897142857143 ± 0.00037142857142857
natural abundance
radioactivity	☢️ radioactive element
half-life	162.61 ± 0.09 d
spin	7/2
nuclear quadrupole moment	0.038 ± 0.012
time of discovery or invention	1940
parity	-

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

⁴⁶Ca

mass number	46
neutron number	26
Relative Atomic Mass	45.953687726 ± 0.000002398 Da
g-factor	0
natural abundance	0.004 ± 0.003
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1938
parity	+

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

⁴⁷Ca

mass number	47
neutron number	27
Relative Atomic Mass	46.954541134 ± 0.000002384 Da
g-factor	-0.40182857142857 ± 0.00031428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	4.536 ± 0.003 d
spin	7/2
nuclear quadrupole moment	0.084 ± 0.006
time of discovery or invention	1951
parity	-

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

⁴⁸Ca

mass number	48
neutron number	28
Relative Atomic Mass	47.952522654 ± 0.000000018 Da
g-factor	0
natural abundance	0.187 ± 0.021
radioactivity	☢️ radioactive element
half-life	56 ± 10 Ey
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1938
parity	+

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

⁴⁹Ca

mass number	49
neutron number	29
Relative Atomic Mass	48.955662625 ± 0.00000019 Da
g-factor	-0.91993333333333 ± 0.00053333333333333
natural abundance
radioactivity	☢️ radioactive element
half-life	8.718 ± 0.006 m
spin	3/2
nuclear quadrupole moment	-0.036 ± 0.003
time of discovery or invention	1950
parity	-

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

⁵⁰Ca

mass number	50
neutron number	30
Relative Atomic Mass	49.957499215 ± 0.0000017 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	13.45 ± 0.05 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1964
parity	+

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

⁵¹Ca

mass number	51
neutron number	31
Relative Atomic Mass	50.960995663 ± 0.00000056 Da
g-factor	-0.69973333333333 ± 0.00073333333333333
natural abundance
radioactivity	☢️ radioactive element
half-life	10 ± 0.8 s
spin	3/2
nuclear quadrupole moment	0.036 ± 0.012
time of discovery or invention	1980
parity	-

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

⁵²Ca

mass number	52
neutron number	32
Relative Atomic Mass	51.963213646 ± 0.00000072 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	4.6 ± 0.3 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1985
parity	+

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

⁵³Ca

mass number	53
neutron number	33
Relative Atomic Mass	52.968451 ± 0.000047 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	461 ± 90 ms
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1983
parity	-

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

⁵⁴Ca

mass number	54
neutron number	34
Relative Atomic Mass	53.972989 ± 0.000052 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	90 ± 6 ms
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1997
parity	+

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

⁵⁵Ca

mass number	55
neutron number	35
Relative Atomic Mass	54.979978 ± 0.000172 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	22 ± 2 ms
spin	5/2
nuclear quadrupole moment
time of discovery or invention	1997
parity	-

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

⁵⁶Ca

mass number	56
neutron number	36
Relative Atomic Mass	55.985496 ± 0.000268 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	11 ± 2 ms
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1997
parity	+

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

⁵⁷Ca

mass number	57
neutron number	37
Relative Atomic Mass	56.992958 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	5/2
nuclear quadrupole moment
time of discovery or invention	2009
parity	-

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

⁵⁸Ca

mass number	58
neutron number	38
Relative Atomic Mass	57.998357 ± 0.000537 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2009
parity	+

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

⁵⁹Ca

mass number	59
neutron number	39
Relative Atomic Mass	59.006237 ± 0.000644 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	5/2
nuclear quadrupole moment
time of discovery or invention	2018
parity	-

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

⁶⁰Ca

mass number	60
neutron number	40
Relative Atomic Mass	60.011809 ± 0.000751 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	0
nuclear quadrupole moment	0
time of discovery or invention	2018
parity	+

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

⁶¹Ca

mass number	61
neutron number	41
Relative Atomic Mass	61.020408 ± 0.000859 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention
parity	-

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

تارىخ

discoverer or inventor	Sir Humphrey Davy
location of discovery	England
time of discovery or invention	1808
etymology	Latin: calx, calcis (lime).
pronunciation	KAL-si-em (ئىنگلىزچە)

source

Abundance
Abundance in Earth's crust	41,500 mg/kg
natural abundance (ئوكيانىيە)	412 mg/L
natural abundance (human body)	1.4 %
natural abundance (meteoroid)	1.1 %
natural abundance (قۇياش)	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

كالتىسىي on ChemicalAid

كالتىسىي (Ca)

Physical Property

Chemical Property

other

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

تارىخ

source

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