Kromyo

Chromium
24Cr
- ↑ Cr ↓ Mo Periodic table vanadium ← chromium → manganese
Panagway
silvery metallic
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	chromium, Cr, 24
Paglitok	/ˈkroʊmiəm/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-mee-əm]]
Kategoriyang elemento	puthaw nga transisyon
Group, period, block	6, 4, 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)
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
Magnetic ordering	AFM (rather: SDW)
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) 8630 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

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.

Galeriya sa hulagway

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