Konupūmā

Konupūmā (Ca)

chemical element with symbol Ca and atomic number 20
Atomic Number20
Atomic Weight40.078
mass number40
Group2
Period4
Blocks
proton20 p+
neutron20 n0
electron20 e-
Animated Bohr model of Ca (Konupūmā)

Āhuatanga Ōkiko

Atomic Radius
180 pm
molar volume
covalent radius
171 pm
Metallic Radius
174 pm
ionic radius
100 pm
Crystal Radius
114 pm
Van der Waals radius
231 pm
density
1.54 g/cm³
Atomic Radii Of The Elements: Konupūmā0153045607590105120135150165180195210225240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energy
proton affinity
electron affinity
0.02455 eV/particle
ionization energy
6.1131552 eV/particle
ionization energy of Ca (Konupūmā)
enthalpy of vaporization
153.6 kJ/mol
enthalpy of fusion
9.2 kJ/mol
standard enthalpy of formation
177.8 kJ/mol
electron
electron shell2, 8, 8, 2
Bohr model: Ca (Konupūmā)
valence electron2
Lewis structure: Ca (Konupūmā)
electron configuration[Ar] 4s2
1s2 2s2 2p6 3s2 3p6 4s2
Enhanced Bohr model of Ca (Konupūmā)
Orbital Diagram of Ca (Konupūmā)
oxidation number1, 2
electronegativity
1
Electrophilicity Index
0.7734001442996138 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
1,757.15 K
Melting Point
1,115.15 K
critical pressure
critical temperature
triple point
appearance
color
Silver
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
typeConductor
electrical conductivity
29 MS/m
electrical resistivity
0.00000003399999999999 m Ω
superconductivity
magnetism
typeparamagnetic
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 StructureFace Centered Cubic (FCC)
lattice constant
5.58 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
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
CategoryAlkaline earth metals, Alkaline earth metals
CAS GroupIIA
IUPAC GroupIIA
Glawe Number16
Mendeleev Number7
Pettifor Number16
Geochemical Classmajor
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
160.8 ± 4 a₀
C6 Dispersion Coefficient
2,163 a₀
allotrope
Neutron cross section
0.43
Neutron Mass Absorption
0.00037
quantum number1S0
space group225 (Fm_3m)

Isotopes of Calcium

Stable Isotopes3
Unstable Isotopes26
Natural Isotopes6
Isotopic Composition4096.94%4096.94%442.09%442.09%420.65%420.65%430.14%430.14%460.00%460.00%480.19%480.19%

33Ca

mass number33
neutron number13
relative atomic mass
33.033312 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention
parity+

decay modeintensity
p (proton emission)

34Ca

mass number34
neutron number14
relative atomic mass
34.015985 ± 0.000322 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

decay modeintensity
2p (2-proton emission)

35Ca

mass number35
neutron number15
relative atomic mass
35.005572 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
25.7 ± 0.2 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1985
parity+

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

36Ca

mass number36
neutron number16
relative atomic mass
35.993074388 ± 0.000042941 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
100.9 ± 1.3 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1977
parity+

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

37Ca

mass number37
neutron number17
relative atomic mass
36.985897849 ± 0.00000068 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
181 ± 0.9 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention1964
parity+

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

38Ca

mass number38
neutron number18
relative atomic mass
37.976319223 ± 0.000000208 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
443.7 ± 0.25 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1966
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

39Ca

mass number39
neutron number19
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
spin3/2
nuclear quadrupole moment
0.038 ± 0.003
time of discovery or invention1943
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

40Ca

mass number40
neutron number20
relative atomic mass
39.96259085 ± 0.000000022 Da
g-factor
0
natural abundance
96.941 ± 0.156
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

decay modeintensity
+ (double β+ decay)

41Ca

mass number41
neutron number21
relative atomic mass
40.962277905 ± 0.000000147 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
99.4 ± 1.5 ky
spin7/2
nuclear quadrupole moment
-0.0665 ± 0.0018
time of discovery or invention1939
parity-

decay modeintensity
ϵ (electron capture)100%

42Ca

mass number42
neutron number22
relative atomic mass
41.95861778 ± 0.000000159 Da
g-factor
0
natural abundance
0.647 ± 0.023
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

43Ca

mass number43
neutron number23
relative atomic mass
42.958766381 ± 0.000000244 Da
g-factor
-0.37638 ± 0.000017142857142857
natural abundance
0.135 ± 0.01
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
-0.0408 ± 0.0008
time of discovery or invention1934
parity-

44Ca

mass number44
neutron number24
relative atomic mass
43.955481489 ± 0.000000348 Da
g-factor
0
natural abundance
2.086 ± 0.11
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1922
parity+

45Ca

mass number45
neutron number25
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
spin7/2
nuclear quadrupole moment
0.038 ± 0.012
time of discovery or invention1940
parity-

decay modeintensity
β (β decay)100%

46Ca

mass number46
neutron number26
relative atomic mass
45.953687726 ± 0.000002398 Da
g-factor
0
natural abundance
0.004 ± 0.003
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
(double β decay)

47Ca

mass number47
neutron number27
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
spin7/2
nuclear quadrupole moment
0.084 ± 0.006
time of discovery or invention1951
parity-

decay modeintensity
β (β decay)100%

48Ca

mass number48
neutron number28
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
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
(double β decay)
β (β decay)

49Ca

mass number49
neutron number29
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
spin3/2
nuclear quadrupole moment
-0.036 ± 0.003
time of discovery or invention1950
parity-

decay modeintensity
β (β decay)100%

50Ca

mass number50
neutron number30
relative atomic mass
49.957499215 ± 0.0000017 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
13.45 ± 0.05 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1964
parity+

decay modeintensity
β (β decay)100%

51Ca

mass number51
neutron number31
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
spin3/2
nuclear quadrupole moment
0.036 ± 0.012
time of discovery or invention1980
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

52Ca

mass number52
neutron number32
relative atomic mass
51.963213646 ± 0.00000072 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4.6 ± 0.3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1985
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)2%

53Ca

mass number53
neutron number33
relative atomic mass
52.968451 ± 0.000047 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
461 ± 90 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1983
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)40%

54Ca

mass number54
neutron number34
relative atomic mass
53.972989 ± 0.000052 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
90 ± 6 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

55Ca

mass number55
neutron number35
relative atomic mass
54.979978 ± 0.000172 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
22 ± 2 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1997
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

56Ca

mass number56
neutron number36
relative atomic mass
55.985496 ± 0.000268 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
11 ± 2 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

57Ca

mass number57
neutron number37
relative atomic mass
56.992958 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention2009
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

58Ca

mass number58
neutron number38
relative atomic mass
57.998357 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2009
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

59Ca

mass number59
neutron number39
relative atomic mass
59.006237 ± 0.000644 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention2018
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

60Ca

mass number60
neutron number40
relative atomic mass
60.011809 ± 0.000751 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

61Ca

mass number61
neutron number41
relative atomic mass
61.020408 ± 0.000859 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Calcium 1

kōrero nehe

discoverer or inventorSir Humphrey Davy
location of discoveryEngland
time of discovery or invention1808
etymologyLatin: calx, calcis (lime).
pronunciationKAL-si-em (Ingarihi)

source

Abundance
Abundance in Earth's crust
41,500 mg/kg
natural abundance (Moana nui)
412 mg/L
natural abundance (human body)
1.4 %
natural abundance (meteoroid)
1.1 %
natural abundance (Te Rā)
0.007 %
Abundance in Universe
0.007 %

Nuclear Screening Constants

1s0.527
2p3.9586
2s6.2236
3p11.3417
3s10.3985
4s15.602