94 Pu 244
Plutonium
actinide
Properties
- Atomic number
- 94
- Atomic mass
- 244 u
- Category
- actinide
- Group
- f-block
- Period
- 7
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.28 (Pauling)
- Density
- 19.816 g/cm³
- Melting point
- 639.35 °C
- Boiling point
- 3231.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁶
Noble-gas shorthand: [Rn] 5f⁶ 7s²
Electrons per shell: 2, 8, 18, 32, 24, 8, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Plutonium
Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states.
- Discovered by Glenn T. Seaborg
- Appearance: silvery white, tarnishing to dark gray in air
Plutonium: frequently asked questions
- What is Plutonium?
- Plutonium (Pu) is the chemical element with atomic number 94. It is a metal: specifically an actinide.
- What is the atomic number of Plutonium?
- Plutonium's atomic number is 94, which means every Plutonium atom has 94 protons in its nucleus.
- What is the electron configuration of Plutonium?
- The electron configuration of Plutonium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f6 (noble-gas shorthand: [Rn] 5f6 7s2). Its electrons are arranged in shells of 2, 8, 18, 32, 24, 8, 2, with 2 in the outermost shell.
- Is Plutonium a metal or a nonmetal?
- Plutonium is a metal: specifically an actinide.
- What group and period is Plutonium in?
- Plutonium sits in the f-block (the actinide row) of period 7 on the periodic table.
- Is Plutonium a solid, liquid, or gas?
- At room temperature, Plutonium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.