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 — that's 2 in the outermost shell.
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
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.