Chromium
Symbol
Cr
Atomic Number
24
Atomic Weight
51.9961
Element Classification
Discovered By
Louis Vauquelin
Discovery Date
1797 (France)
Name Origin
Greek: chroma (color).
Density(g/cc)
7.18
Melting Point
2130
Boiling Point(K)
2945
Appearance
Very hard, crystalline, steel-gray metal
Atomic Radius(pm)
130
Atomic Volume(cc/mol)
7.23
Covalent Radius(pm)
118
Ionic Radius
52 (+6e) 63 (+3e)
Specific Heat
0.488
Fusion Heat
21
Evaporation Heat(kj/mol)
342
Thermal Conductivity(@25°C W/m K)
93.9
Debye Temperature
460.00
Pauling Negativity Number
1.66
First Ionizing Energy(kj/mol)
652.4
Oxidation States
6, 3, 2, 0
Electronic Configuration
[Ar] 3d5 4s1
Lattice Structure
Body-Centered Cubic(BCC)
Lattice Constant
2.880
Lattice C/A Ratio
n/a
