Template:Infobox calcium

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Calcium,  20Ca
Calcium unter Argon Schutzgasatmosphäre.jpg
Calcium Spectrum.png
Spectral lines of calcium
General properties
Name, symbol calcium, Ca
Pronunciation /ˈkælsiəm/
KAL-see-əm
Appearance dull gray, silver
Calcium in the periodic table
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (post-transition metal)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
Mg

Ca

Sr
potassiumcalciumscandium
Atomic number 20
Standard atomic weight (±) 40.078(4)[1]
Element category   alkaline earth metal
Group, block group 2 (alkaline earth metals), s-block
Period period 4
Electron configuration [Ar] 4s2
per shell 2, 8, 8, 2
Physical properties
Phase solid
Melting point 1115 K ​(842 °C, ​1548 °F)
Boiling point 1757 K ​(1484 °C, ​2703 °F)
Density near r.t. 1.55 g·cm−3
when liquid, at m.p. 1.378 g·cm−3
Heat of fusion 8.54 kJ·mol−1
Heat of vaporization 154.7 kJ·mol−1
Molar heat capacity 25.929 J·mol−1·K−1
vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 864 956 1071 1227 1443 1755
Atomic properties
Oxidation states +2, +1, −1[2] ​(a strongly basic oxide)
Electronegativity Pauling scale: 1.00
Ionization energies 1st: 589.8 kJ·mol−1
2nd: 1145.4 kJ·mol−1
3rd: 4912.4 kJ·mol−1
(more)
Atomic radius empirical: 197 pm
Covalent radius 176±10 pm
Van der Waals radius 231 pm
Miscellanea
Crystal structure face-centered cubic (fcc)
Face-centered cubic crystal structure for calcium
Speed of sound thin rod 3810 m·s−1 (at 20 °C)
Thermal expansion 22.3 µm·m−1·K−1 (at 25 °C)
Thermal conductivity 201 W·m−1·K−1
Electrical resistivity 33.6 nΩ·m (at 20 °C)
Magnetic ordering diamagnetic
Young's modulus 20 GPa
Shear modulus 7.4 GPa
Bulk modulus 17 GPa
Poisson ratio 0.31
Mohs hardness 1.75
Brinell hardness 170-416 MPa
CAS Registry Number 7440-70-2
History
Discovery and first isolation Humphry Davy (1808)
Most stable isotopes
Main article: Isotopes of calcium
iso NA half-life DM DE (MeV) DP
40Ca 96.941% >5.9×1021 y (β+β+) 0.194 40Ar
41Ca trace 1.03×105 y ε 41K
42Ca 0.647% 42Ca is stable with 22 neutrons
43Ca 0.135% 43Ca is stable with 23 neutrons
44Ca 2.086% 44Ca is stable with 24 neutrons
45Ca syn 162.7 d β 0.258 45Sc
46Ca 0.004% >8.8×1022 y (ββ) 0.988 46Ti
47Ca syn 4.536 d β 0.694, 1.99 47Sc
γ 1.297
48Ca 0.187% 4.3×1019 y ββ 4.274 48Ti
) 0.0058 48Sc
Decay modes in parentheses are predicted, but have not yet been observed
· references

References

These references will appear in the article, but this list appears only on this page.
  1. ^ Standard Atomic Weights 2013. Commission on Isotopic Abundances and Atomic Weights
  2. ^ Krieck, Sven; Görls, Helmar; Westerhausen, Matthias (2010). "Mechanistic Elucidation of the Formation of the Inverse Ca(I) Sandwich Complex [(thf)3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf)3] and Stability of Aryl-Substituted Phenylcalcium Complexes". Journal of the American Chemical Society 132 (35): 100818110534020. doi:10.1021/ja105534w. PMID 20718434. 
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Infoboxes for the chemical elements use the core template {{Infobox element}}.

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ionization energy
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References

These references will appear in the article, but this list appears only on this page.
  1. ^ Endt, P. M. "Energy levels of A = 21–44 nuclei (VII)". Nuclear Physics A. 
  2. ^ Chisté 2006.

See also[edit]

Index to chemical element infoboxes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1H
ibox E
2He
ibox E
2 3Li
ibox E
4Be
ibox E
5B
ibox E
6C
ibox E
7N
ibox E
8O
ibox E
9F
ibox E
10Ne
ibox E
3 11Na
ibox E
12Mg
ibox E
13Al
ibox E
14Si
ibox E
15P
ibox E
16S
ibox E
17Cl
ibox E
18Ar
ibox E
4 19K
ibox E
20Ca
ibox E
21Sc
ibox E
22Ti
ibox E
23V
ibox E
24Cr
ibox E
25Mn
ibox E
26Fe
ibox E
27Co
ibox E
28Ni
ibox E
29Cu
ibox E
30Zn
ibox E
31Ga
ibox E
32Ge
ibox E
33As
ibox E
34Se
ibox E
35Br
ibox E
36Kr
ibox E
5 37Rb
ibox E
38Sr
ibox E
39Y
ibox E
40Zr
ibox E
41Nb
ibox E
42Mo
ibox E
43Tc
ibox E
44Ru
ibox E
45Rh
ibox E
46Pd
ibox E
47Ag
ibox E
48Cd
ibox E
49In
ibox E
50Sn
ibox E
51Sb
ibox E
52Te
ibox E
53 I 
ibox E
54Xe
ibox E
6 55Cs
ibox E
56Ba
ibox E
1 asterisk 72Hf
ibox E
73Ta
ibox E
74W
ibox E
75Re
ibox E
76Os
ibox E
77Ir
ibox E
78Pt
ibox E
79Au
ibox E
80Hg
ibox E
81Tl
ibox E
82Pb
ibox E
83Bi
ibox E
84Po
ibox E
85At
ibox E
86Rn
ibox E
7 87Fr
ibox E
88Ra
ibox E
1 asterisk 104Rf
ibox E
105Db
ibox E
106Sg
ibox E
107Bh
ibox E
108Hs
ibox E
109Mt
ibox E
110Ds
ibox E
111Rg
ibox E
112Cn
ibox E
113Uut
ibox E
114Fl
ibox E
115Uup
ibox E
116Lv
ibox E
117Uus
ibox E
118Uuo
ibox E
8 119Uue
ibox E
120Ubn
ibox E
1 asterisk 57La
ibox E
58Ce
ibox E
59Pr
ibox E
60Nd
ibox E
61Pm
ibox E
62Sm
ibox E
63Eu
ibox E
64Gd
ibox E
65Tb
ibox E
66Dy
ibox E
67Ho
ibox E
68Er
ibox E
69Tm
ibox E
70Yb
ibox E
71Lu
ibox E
 
1 asterisk 89Ac
ibox E
90Th
ibox E
91Pa
ibox E
92U
ibox E
93Np
ibox E
94Pu
ibox E
95Am
ibox E
96Cm
ibox E
97Bk
ibox E
98Cf
ibox E
99Es
ibox E
100Fm
ibox E
101Md
ibox E
102No
ibox E
103Lr
ibox E
 
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