Krómíọ̀mù

Chromium, ₂₄Cr
Chromium
Ìhànsójú	silvery metallic
Ìwúwo átọ̀mù Ar, std(Cr)	51.9961(6)
Chromium ní orí tábìlì àyè
	vanadium ← chromium → manganese
Nọ́mbà átọ̀mù (Z)	24
Ẹgbẹ́	group 6
Àyè	àyè 4
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Ar] 3d5 4s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 13, 1
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	2180 K (1907 °C, 3465 °F)
Ígbà ìhó	2944 K (2671 °C, 4840 °F)
Kíki (near r.t.)	7.19 g/cm3
when liquid (at m.p.)	6.3 g/cm3
Heat of fusion	21.0 kJ/mol
Heat of	339.5 kJ/mol
Molar heat capacity	23.35 J/(mol·K)
Atomic properties
Oxidation states	−4, −2, −1, 0, +1, +2, +3, +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.66
energies	(more);
Atomic radius	empirical: 128 pm
Covalent radius	139±5 pm
	Color lines in a spectral rangeSpectral lines of chromium
Other properties
Natural occurrence	primordial
Crystal structure	(bcc)
Speed of sound thin rod	5940 m/s (at 20 °C)
Thermal expansion	4.9 µm/(m·K) (at 25 °C)
Thermal conductivity	93.9 W/(m·K)
Electrical resistivity	125 n Ω·m (at 20 °C)
Magnetic ordering	AFM (rather: SDW)
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 Number	7440-47-3
Main isotopes of chromium
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

Àyọkà yìí tàbí apá rẹ̀ únfẹ́ àtúnṣe sí.

Ẹ le fẹ̀ jù báyìí lọ tàbí kí ẹ ṣàtúnṣe rẹ̀ lọ́nà tí yíò mu kúnrẹ́rẹ́. Ẹ ran Wikipedia lọ́wọ́ láti fẹ̀ẹ́ jù báyìí lọ.

Itokasi

↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Fawcett, Eric (1988). "Spin-density-wave antiferromagnetism in chromium". Reviews of Modern Physics 60: 209. doi:10.1103/RevModPhys.60.209.