Yes. Curium is a metal, classified as an actinide on the periodic table.

How many protons does curium have?

Curium has 96 protons. Its atomic number is 96, which is also the number of electrons in a neutral atom of curium.

What group and period is curium in?

Curium is in period 7 of the periodic table. As an actinide in the f-block, it sits in a separate row below the main table and has no standard group number.

What is the atomic mass of curium?

The atomic mass of curium is 247 u (unified atomic mass units).

Element 96

Curium (Cm)

Actinide · Period 7 · f-block

Curium (Cm) is element 96 of the periodic table, an actinide in period 7 (f-block) with an atomic mass of 247 and is a solid at standard conditions.

At a glance

Atomic number: 96
Symbol: Cm
Atomic mass: 247 u
Category: Actinides
Period: 7
Block: f-block
Phase at STP: solid

Electron structure

Electron configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f7 6d1 7s2
Shorthand configuration: [Rn] 5f7 6d1 7s2
Electrons per shell: 2, 8, 18, 32, 25, 9, 2
Oxidation states: +3, +4, +5, +6

Physical properties

Melting point: 1,613 K (1,339.85 °C)
Boiling point: 3,383 K (3,109.85 °C)
Density: 13.51 g/cm³
Phase: solid

Atomic properties

Electronegativity (Pauling): 1.3
Atomic radius: 174 pm
Covalent radius: 169 pm
First ionization energy: 581 kJ/mol
Electron affinity: 28 kJ/mol

Notable isotopes

Notable isotopes of Curium: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
Cm-247	247.07035	-	Half-life 15.6 million years

Common uses

Space missions power
Pacemakers
Scientific research

Discovery

Year: 1944
Discovered by: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Country: USA

Frequently asked questions

Is curium a metal?: Yes. Curium is a metal, classified as an actinide on the periodic table.
How many protons does curium have?: Curium has 96 protons. Its atomic number is 96, which is also the number of electrons in a neutral atom of curium.
What group and period is curium in?: Curium is in period 7 of the periodic table. As an actinide in the f-block, it sits in a separate row below the main table and has no standard group number.
What is the atomic mass of curium?: The atomic mass of curium is 247 u (unified atomic mass units).

Keep exploring

Curium'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.