Yes. Platinum is a metal, classified as a transition metal on the periodic table.

How many protons does platinum have?

Platinum has 78 protons. Its atomic number is 78, which is also the number of electrons in a neutral atom of platinum.

What group and period is platinum in?

Platinum is in group 10 and period 6 of the periodic table, in the d-block.

What is the atomic mass of platinum?

The atomic mass of platinum is 195.08 u (unified atomic mass units).

Element 78

Platinum (Pt)

Transition metal · Period 6 · Group 10 · d-block

Platinum (Pt) is element 78 of the periodic table, a transition metal in period 6, group 10 (d-block) with an atomic mass of 195.08 and is a solid at standard conditions.

At a glance

Atomic number: 78
Symbol: Pt
Atomic mass: 195.08 u
Category: Transition metals
Period: 6
Group: 10
Block: d-block
Phase at STP: solid

Electron structure

Electron configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d9 6s1
Shorthand configuration: [Xe] 4f14 5d9 6s1
Electrons per shell: 2, 8, 18, 32, 17, 1
Oxidation states: -3, -2, -1, +1, +2, +3, +4, +5, +6

Physical properties

Melting point: 2,041.4 K (1,768.25 °C)
Boiling point: 4,098 K (3,824.85 °C)
Density: 21.46 g/cm³
Phase: solid

Atomic properties

Electronegativity (Pauling): 2.28
Atomic radius: 177 pm
Covalent radius: 136 pm
Van der Waals radius: 175 pm
First ionization energy: 870 kJ/mol
Electron affinity: 205 kJ/mol

Notable isotopes

Notable isotopes of Platinum: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
Pt-195	194.96479	33.83%	Stable

Common uses

Jewelry
Catalytic converters
Chemotherapy
Electronics

Discovery

Year: 1735
Discovered by: Antonio de Ulloa
Country: Colombia

Frequently asked questions

Is platinum a metal?: Yes. Platinum is a metal, classified as a transition metal on the periodic table.
How many protons does platinum have?: Platinum has 78 protons. Its atomic number is 78, which is also the number of electrons in a neutral atom of platinum.
What group and period is platinum in?: Platinum is in group 10 and period 6 of the periodic table, in the d-block.
What is the atomic mass of platinum?: The atomic mass of platinum is 195.08 u (unified atomic mass units).

Keep exploring

Platinum's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.