96 Cm 247
Curium
actinide
Properties
- Atomic number
- 96
- Atomic mass
- 247 u
- Category
- actinide
- Group
- f-block
- Period
- 7
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.28 (Pauling)
- Density
- 13.51 g/cm³
- Melting point
- 1339.85 °C
- Boiling point
- 3109.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁷ 6d¹
Noble-gas shorthand: [Rn] 5f⁷ 6d¹ 7s²
Electrons per shell: 2, 8, 18, 32, 25, 9, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Curium
Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.
- Discovered by Glenn T. Seaborg
- Appearance: silvery metallic, glows purple in the dark
Curium: frequently asked questions
- What is Curium?
- Curium (Cm) is the chemical element with atomic number 96. It is a metal: specifically an actinide.
- What is the atomic number of Curium?
- Curium's atomic number is 96, which means every Curium atom has 96 protons in its nucleus.
- What is the electron configuration of Curium?
- The electron configuration of Curium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f7 6d1 (noble-gas shorthand: [Rn] 5f7 6d1 7s2). Its electrons are arranged in shells of 2, 8, 18, 32, 25, 9, 2, with 2 in the outermost shell.
- Is Curium a metal or a nonmetal?
- Curium is a metal: specifically an actinide.
- What group and period is Curium in?
- Curium sits in the f-block (the actinide row) of period 7 on the periodic table.
- Is Curium a solid, liquid, or gas?
- At room temperature, Curium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.