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| − | {{Elementbox
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| − | |name=calcium
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| − | |number=20
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| − | |symbol=Ca
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| − | |pronounce={{IPAc-en|icon|ˈ|k|æ|l|s|i|əm}}, {{respell|KAL|see-əm}}
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| − | |left= [[カリウム]]
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| − | |right= [[スカンジウム]]
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| − | |above= [[マグネシウム|Mg]]
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| − | |below= [[ストロンチウム|Sr]]
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| − | |series=アルカリ土類金属
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| − | |series comment=
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| − | |group=2
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| − | |period=4
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| − | |block=s
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| − | |series color=
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| − | |phase color=
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| − | |appearance=銀白色、金属光沢の固体
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| − | |image name=Calcium unter Argon Schutzgasatmosphäre.jpg
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| − | |image size=
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| − | |image name comment=
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| − | |image name 2=Calcium Spectrum.png
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| − | |image name 2 comment=カルシウムのスペクトル線
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| − | |atomic mass=40.078
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| − | |atomic mass 2=
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| − | |atomic mass comment=
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| − | |electron configuration=[[[アルゴン|Ar]]] 4s<sup>2</sup>
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| − | |electrons per shell=2, 8, 8, 2
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| − | |color=
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| − | |phase=固体
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| − | |phase comment=
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| − | |density gplstp=
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| − | |density gpcm3nrt=1.550
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| − | |density gpcm3nrt 2=
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| − | |density gpcm3mp=1.378
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| − | |melting point K=1115
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| − | |melting point C=842
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| − | |melting point F=1548
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| − | |boiling point K=1757
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| − | |boiling point C=1484
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| − | |boiling point F=2703
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| − | |triple point K=
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| − | |triple point kPa=
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| − | |critical point K=
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| − | |critical point MPa=
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| − | |heat fusion= 8.54
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| − | |heat fusion 2=
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| − | |heat vaporization=154.7
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| − | |heat capacity=25.929
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| − | |vapor pressure 1=864
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| − | |vapor pressure 10=956
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| − | |vapor pressure 100=1071
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| − | |vapor pressure 1 k=1227
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| − | |vapor pressure 10 k=1443
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| − | |vapor pressure 100 k=1755
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| − | |vapor pressure comment=
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| − | |crystal structure=face-centered cubic
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| − | |japanese crystal structure=[[面心立方格子構造]]
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| − | |oxidation states='''2''', 1
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| − | |oxidation states comment=[[強塩基性酸化物]]
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| − | |electronegativity=1.00
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| − | |number of ionization energies=10
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| − | |1st ionization energy=589.8
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| − | |2nd ionization energy=1145.4
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| − | |3rd ionization energy=4912.4
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| − | |atomic radius=[[1 E-10 m|197]]
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| − | |covalent radius=[[1 E-10 m|176±10]]
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| − | |Van der Waals radius=[[1 E-10 m|231]]
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| − | |magnetic ordering=[[反磁性]]
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| − | |electrical resistivity=
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| − | |electrical resistivity at 0=
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| − | |electrical resistivity at 20=33.6 n
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| − | |thermal conductivity=201
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| − | |thermal conductivity 2=
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| − | |thermal diffusivity=
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| − | |thermal expansion=
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| − | |thermal expansion at 25=22.3
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| − | |speed of sound=
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| − | |speed of sound rod at 20=
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| − | |speed of sound rod at r.t.=3810
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| − | |Young's modulus=20
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| − | |Shear modulus=7.4
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| − | |Bulk modulus=17
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| − | |Poisson ratio=0.31
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| − | |Mohs hardness=1.75
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| − | |Vickers hardness=
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| − | |Brinell hardness=167
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| − | |CAS number= 7440-70-2
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| − | |isotopes=
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| − | {{Elementbox_isotopes_stable | mn=[[カルシウム40|40]] | sym=Ca | na=96.941 % | n=20}}
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| − | {{Elementbox_isotopes_stable | mn=[[カルシウム42|42]] | sym=Ca | na=0.647 % | n=22}}
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| − | {{Elementbox_isotopes_stable | mn=[[カルシウム43|43]] | sym=Ca | na=0.135 % | n=23}}
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| − | {{Elementbox_isotopes_stable | mn=[[カルシウム44|44]] | sym=Ca | na=2.086 % | n=24}}
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| − | |isotopes comment=
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| − | }}
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| | '''カルシウム'''（{{lang-lan-short|calcium}}<ref>http://www.encyclo.co.uk/webster/C/7</ref>、{{lang-en-short|calcium}} {{IPA-en|ˈkælsiəm|}}） | | '''カルシウム'''（{{lang-lan-short|calcium}}<ref>http://www.encyclo.co.uk/webster/C/7</ref>、{{lang-en-short|calcium}} {{IPA-en|ˈkælsiəm|}}） |
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