Neptunium Symbol, Standard state, Atomic mass, Electron configuration, Oxidation states, Electronegativity (pauling scale), Atomic radius (van der waals). 14 properties. Comparisons. Similar objects.

Neptunium [+]Compare [E]dit [H]istory

Aliases: Np

Object «Neptunium» was created due to

Chemistry

Elements

Add new object to «Neptunium» or move existing objects here.

Object «Neptunium» has attributes [Show empty attributes][Hide empty attributes]

Attribute	Value
Symbol	Np
Standard state	Solid
Atomic mass	237.048172 u
Electron configuration	[Rn]7s²5f⁴6d¹
Oxidation states	+3 +4 +5 +6
Electronegativity (pauling scale)	1.36
Atomic radius (van der waals)	221 pm
Ionization energy	6.266 eV
Melting point	917 K
Boiling point	4175 K
Density	20.25 g/cm³
Atomic number	93
Group name	Actinide
Discovered	1940 year
Electron affinity	Add

Similar objects

Most often compared with

Everyone can something to edit or add.
There was one edit, no edits waiting approval. Last edited by fink.isabella(301), Jun 1, 2022 (18 fields were changed)

[C]ompare » ×