Platinum
Symbol
Pt
Atomic Number
78
Atomic Weight
195.08
Element Classification
Discovered By
Julius Scaliger
Discovery Date
1735 (Italy)
Name Origin
Spanish: platina (little silver).
Density (g/cc)
21.45
Melting Point (K)
2045
Boiling Point (K)
4100
Appearance
Very heavy, soft, silvery-white metal
Atomic Radius (pm)
139
Atomic Volume (cc/mol)
9.10
Covalent Radius (pm)
130
Ionic Radius
65 (+4e) 80 (+2e)
Specific Heat
0.133
Fusion Heat (kJ/mol)
21.76
Evaporation Heat (kJ/mol)
~470
Thermal Conductivity (@25°C W/m K)
71.6
Debye Temperature (K)
230.00
Pauling Negativity Number
2.28
First Ionizing Energy (kJ/mol)
868.1
Oxidation States
4, 2, 0
Electronic Configuration
[Xe] 4f14 5d9 6s1
Lattice Structure
Face-Centered Cubic(FCC)
Lattice Constant
3.920
Lattice C/A Ratio
n/a
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