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Kromyo

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Chromium
24Cr
-

Cr

Mo
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
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Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
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Vanadium (transition metal)
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Manganese (transition metal)
Iron (transition metal)
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Nickel (transition metal)
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Actinium (actinoid)
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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 (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
vanadiumchromiummanganese
Panagway
silvery metallic
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan chromium, Cr, 24
Paglitok /ˈkrmiəm/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-mee-əm]]
Kategoriyang elemento puthaw nga transisyon
Group, period, block 64, d
Gibug-aton sa atomo 51.9961(6)
Kontorno sa elektron [Ar] 3d5 4s1
2, 8, 13, 1
Electron shells of chromium (2, 8, 13, 1)
Electron shells of chromium (2, 8, 13, 1)
History
Pagkadiskobre Louis Nicolas Vauquelin (1797)
First isolation Louis Nicolas Vauquelin (1798)
Physical properties
Phase magahi
Density (near r.t.) 7.19 g·cm−3
Liquid density at m.p. 6.3 g·cm−3
Melting point 2180 K, 1907 °C, 3465 °F
Boiling point 2944 K, 2671 °C, 4840 °F
Heat of fusion 21.0 kJ·mol−1
Heat of vaporization 339.5 kJ·mol−1
Molar heat capacity 23.35 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1656 1807 1991 2223 2530 2942
Atomic properties
Oxidation states 6, 5, 4, 3, 2, 1, -1, -2
(strongly acidic oxide)
Electronegativity 1.66 (Pauling scale)
Ionization energies
(more)
1st: 652.9 kJ·mol−1
2nd: 1590.6 kJ·mol−1
3rd: 2987 kJ·mol−1
Atomic radius 128 pm
Covalent radius 139±5 pm
Miscellanea
Crystal structure body-centered cubic
Chromium has a body-centered cubic crystal structure
Magnetic ordering AFM (rather: SDW[1])
Electrical resistivity (20 °C) 125 nΩ·m
Thermal conductivity 93.9 W·m−1·K−1
Thermal expansion (25 °C) 4.9 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 5940 m·s−1
Young's modulus 279 GPa
Shear modulus 115 GPa
Bulk modulus 160 GPa
Poisson ratio 0.21
Mohs hardness 8.5
Vickers hardness 1060 MPa
Brinell hardness 1120 MPa
CAS registry number 7440-47-3
Most stable isotopes
Main article: Isotopes of chromium
iso NA half-life DM DE (MeV) DP
50Cr 4.345% >1.3×1018 y β+β+ 1.167 50Ti
51Cr syn 27.7025 d ε - 51V
γ 0.320 -
52Cr 83.789% 52Cr is stable with 28 neutrons
53Cr 9.501% 53Cr is stable with 29 neutrons
54Cr 2.365% 54Cr is stable with 30 neutrons
· r

Ang kromyo o cromo (Iningles chromium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Cr ug kaiphan nga atomik 24. Ang kromyo mao ang puthaw nga transisyon.

Ang mga gi basihan niini

[usba | usba ang wikitext]
  1. Fawcett, Eric (1988). "Spin-density-wave antiferromagnetism in chromium". Reviews of Modern Physics. 60: 209. Bibcode:1988RvMP...60..209F. doi:10.1103/RevModPhys.60.209.


Galeriya sa hulagway

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