Platina

78
Pt
Grupp
10
Period
6
Block
d
Protoner
Electrons
Neutroner
78
78
117
Generella Egenskaper
Atomnummer
78
Atommassa
195,084
Mass Number
195
Kategori
Övergångsmetaller
Färg
Grå
Radioaktiv
Nej
From the Spanish word platina, meaning silver
Kristallstruktur
Ytcentrerat kubiskt
Historia
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.
Elektroner per skal
2, 8, 18, 32, 17, 1
Elektronkonfiguration
[Xe] 4f14 5d9 6s1
Pt
Platinum exists in higher abundances on the Moon and in meteorites
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
21,45 g/cm3
Smältpunkt
2041,45 K | 1768,3 °C | 3214,94 °F
Kokpunkt
4098,15 K | 3825 °C | 6917 °F
Smältvärme
20 kJ/mol
Ångbildningsvärme
490 kJ/mol
Specifik värmekapacitet
0,133 J/g·K
Abundance in Earth's crust
3,7×10-6%
Abundance in Universe
5×10-7%
A
Bildkrediter: Wikimedia Commons (Alchemist-hp)
A native platinum nugget
CAS Number
7440-06-4
PubChem CID Number
23939
Atomära Egenskaper
Atomradie
139 pm
Kovalent radie
136 pm
Elektronegativitet
2,28 (Paulingskalan)
Jonisationspotential
8,9587 eV
Molvolym
9,10 cm3/mol
Värmeledningsförmåga
0,716 W/cm·K
Oxidationstillstånd
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
Isotoper
Stabila isotoper
192Pt, 194Pt, 195Pt, 196Pt, 198Pt
Instabila isotoper
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