Neptunium
Neptunium (Np) is a chemical element belonging to the category Inner transition metal, with atomic number 93 and atomic mass 237.0000 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Neptunium
- Symbol: Np
- Atomic number: 93
- Atomic mass: 237.0000 u
Position in the periodic table
- Group: 3
- Period: 7
- Category: Inner transition metal
Physico-chemical properties
- Standard state: Solid
- Melting point: About 640°C
- Density: Very high
- Electron configuration: [Rn] 5f⁴ 6d¹ 7s²
Scientific description
Neptunium is a chemical element with symbol Np and atomic number 93. It belongs to the category of Inner transition metal and occupies group 3 and period 7. Its standard atomic mass is 237.0000 u.
KODO: Q3