Periodic table of the elements
IridiumPlatinumGold
78
Pt
Platinum
195.084		2
8
18
32
17
1
78
Pt
Platinum
195.084		2
8
18
32
17
1
General
NamePlatinum
SymbolPt
Number78
Chemical seriesTransition elements
Group / Period10 / 6
Blockd-block
CAS registry number7440-06-4

Physical properties
Statesolid
Density21.45 g/cm3
Melting point2041.4 K (1768.3 °C, 3214.9 °F)
Boiling point4098 K (3825 °C, 6917 °F)
Critical point

Atomic properties
Atomic Weight195.084 g/mol
Crystal structurecubic face centered
Electronegativity2.28
Atomic radius135 pm
Atomic radius (calculated)177 pm
Electron configuration[Xe] 4f14 5d9 6s1
Electrons per shell2, 8, 18, 32, 17, 1
Number of protons78
Number of neutrons117

Other languages
SpanishPlatino
PortuguesePlatina
FrenchPlatine
GermanPlatin
ItalianPlatino
RussianПлатина
PolishPlatyna
Chinese铂
Arabicبلاتين
TurkishPlatin
DutchPlatina


Periodic table of the elements
IridiumPlatinumGold