Cr - Chromium

This transition metal was discovered by Vanquelin in 1790. Modern uses include pigment, high strength alloys and metal finishing applications.

Atomic number - 24 Density g/mL 7 .19

Atomic weight u 51 .996 Melting point K 2130

Bonding radius A 1 .18 Boiling point K 2945

Atomic radius A 1 .85 Heat of vaporization kJ/mol 344 .3

Ionization Potential V 6 .766 Heat of fusion kJ/mol 16 .9

Electronegativity - 1 .66 Specific heat J/gK 0 .45

The oxide is a strong acid.
Crystal are body centered cubic.

Electron config. : [Ar] 3d⁵ 4s¹

Isotopes of Cr: Click mass number for decay process, product for element page.

043 21 msec EC/ECa/ECp,15.700 V-43/Sc-39/Ti-42 42.997702	044 53 msec ECp,8.580 MeV Ti-43 43.985474	045 50 msec EC/ECp,12.460 V-45/Ti-44 44.979162	046 0.26 sec EC,7.603 MeV V-46 45.968361	047 500 msec EC,7.451 MeV V-47 46.962905	048 21.56 hr EC,1.659 MeV V-48 47.954036	049 42.3 min EC,2.631 MeV V-49 48.951341
050 4.345% 1.8E+17 yr 2EC,1.037 MeV Ti-50 49.946049	051 27.702 da EC,2.471 MeV V-51 50.944771	052 83.789% Stable 51.940511	053 9.501% Stable 52.940653	054 2.365% Stable 53.938884	055 3.497 min B-,2.603 MeV Mn-55 54.940844	056 5.94 min B-,1.617 MeV Mn-56 55.940644
057 21.1 sec B-,5.090 MeV Mn-57 56.943757	058 7.0 sec B-,4.010 MeV Mn-58 57.944293	059 0.74 sec B-,7.700 MeV Mn-59 58.948716	060 0.57 sec B-,5.900 MeV Mn-60 59.949758	061 200 nsec B-,8.800 MeV Mn-61 60.954052	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

Atomic number	-	24		Density	g/mL	7	.19
Atomic weight	u	51	.996	Melting point	K	2130
Bonding radius	A	1	.18	Boiling point	K	2945
Atomic radius	A	1	.85	Heat of vaporization	kJ/mol	344	.3
Ionization Potential	V	6	.766	Heat of fusion	kJ/mol	16	.9
Electronegativity	-	1	.66	Specific heat	J/gK	0	.45
The oxide is a strong acid.				Crystal are body centered cubic.
Electron config. : [Ar] 3d⁵ 4s¹