Platină
78
Pt
Grupă
10
Perioadă
6
Bloc
d
Protoni
Electroni
Neutroni
78
78
117
Proprietăți Generale
Număr atomic
78
Masă atomică
195,084
Numar de masa
195
Categorie
Metale de tranziție
Culoare
Gri
Radioactive
Nu
Din cuvântul spaniol platina, însemnând argint
Structură cristalină
Față Centrată Cubic
Istoric
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.
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.
Electroni pe nivelul de energie
2, 8, 18, 32, 17, 1
Configurație electronică
[Xe] 4f14 5d9 6s1
Platinum exists in higher abundances on the Moon and in meteorites
Proprietăți Fizice
Fază
Solid
Densitate
21,45 g/cm3
Punct de topire
2041,45 K | 1768,3 °C | 3214,94 °F
Punct de fierbere
4098,15 K | 3825 °C | 6917 °F
Energie de fuziune
20 kJ/mol
Energie de evaporare
490 kJ/mol
Căldură specifică
0,133 J/g·K
Abundența în scoarța Pământului
3,7×10-6%
Abundența în Univers
5×10-7%
Numarul CAS
7440-06-4
Număr CID PubChem
23939
Proprietăți Atomice
Rază atomică
139 pm
Rază de covalență
136 pm
Electronegativitate
2,28 (Scara lui Pauling)
Potențial de ionizare
8,9587 eV
Volum molar
9,10 cm3/mol
Conductivitate termică
0,716 W/cm·K
Număr de oxidare
2, 4, 5, 6
Aplicații
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 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
Izotopi
Izotopi stabili
192Pt, 194Pt, 195Pt, 196Pt, 198PtIzotopi instabili
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