Platinum

78
Pt
Group
10
Period
6
Block
d
Protons
Electrons
Neutrons
78
78
117
General Properties
Atomic Number
78
Atomic Weight
195.084
Mass Number
195
Category
Transition metals
Colour
Gray
Radioactive
No
From the Spanish word platina, meaning silver
Crystal Structure
Face Centered Cubic
History
Platinum was first used by pre-Columbian South American natives to produce artifacts.

Antonio de Ulloa published his findings about platinum in 1748, but Sir Charles Wood also investigated the metal in 1741.

First reference to it as a new metal was made by William Brownrigg in 1750.
Electrons per shell
2, 8, 18, 32, 17, 1
Electron Configuration
[Xe] 4f14 5d9 6s1
Pt
Platinum exists in higher abundances on the Moon and in meteorites
Physical Properties
Phase
Solid
Density
21.45 g/cm3
Melting Point
2041.45 K | 1768.3 °C | 3214.94 °F
Boiling Point
4098.15 K | 3825 °C | 6917 °F
Heat of Fusion
20 kJ/mol
Heat of Vaporization
490 kJ/mol
Specific Heat Capacity
0.133 J/g·K
Abundance in Earth's crust
3.7×10-6%
Abundance in Universe
5×10-7%
A
Image Credits: Wikimedia Commons (Alchemist-hp)
A native platinum nugget
CAS Number
7440-06-4
PubChem CID Number
23939
Atomic Properties
Atomic Radius
139 pm
Covalent Radius
136 pm
Electronegativity
2.28 (Pauling scale)
Ionization Potential
8.9587 eV
Atomic Volume
9.10 cm3/mol
Thermal Conductivity
0.716 W/cm·K
Oxidation States
2, 4, 5, 6
Applications
The most common use of platinum is as a catalyst in chemical reactions.

Platinum is used in jewelry, decoration and dental work.

Platinum-cobalt, an alloy of roughly three parts platinum and one part cobalt, is used to make relatively strong permanent magnets.

Platinum-based anodes are used in ships, pipelines, and steel piers.
Platinum is considered to be non-toxic
Isotopes
Stable Isotopes
192Pt, 194Pt, 195Pt, 196Pt, 198Pt
Unstable Isotopes
166Pt, 167Pt, 168Pt, 169Pt, 170Pt, 171Pt, 172Pt, 173Pt, 174Pt, 175Pt, 176Pt, 177Pt, 178Pt, 179Pt, 180Pt, 181Pt, 182Pt, 183Pt, 184Pt, 185Pt, 186Pt, 187Pt, 188Pt, 189Pt, 190Pt, 191Pt, 193Pt, 197Pt, 199Pt, 200Pt, 201Pt, 202Pt