List of elements
 » Argon
 » Boron
 » Gold
 » Iron
 » Lead
 » Neon
 » Radon
 » Tin
 » Xenon
 » Zinc
mineralogy elements Np Neptunium

Np - Neptunium - METAL ACTINIDES

640°
3902°
237
3
4
5
6
7
93
Np
[Rn] 5f4 6d1 7s2
2
8
18
32
22
9
2
1.36
6.2657
Synthetic
Radioactive
Liquid
Gaseous
Neptunium Electronic configuration diagram
Electronic configuration diagram

Name Neptunium
Number 93
Atomic 237
Symbol Np
Fusion 640
Boiling 3902
Density 20.45
Period 7
Group 0
Discovery 1940 McMillan and Abelson
Abundance 0.001
Radius 0
Electronegativity 1.36
Ionization 6.2657
Number of isotopes 153
Electronic configuration [Rn] 5f4 6d1 7s2
Oxidation states 3,4,5,6,7
Electron by energy level 2,8,18,32,22,9,2