FLW Incorporated | Specialists in Physical Measurement, Testing, Calibration & Control

Periodic Table

Picture of  Neptunium

 Atomic No. Order:

 Alphabetic Order:

Ground State Electron Configuration of  Neptunium
Symbol: Np
Atomic Number: 93
Atomicmass: (237) g.mol -1
Electronegative (According to Pauling): 1.3
Density: 20.25 g.cm-3 at 20°C
Melting Point: 640 °C
Boiling Point: 3902 °C
Venderwaals Radius: unknown
Ionic Radius: unknown
Isotopes: 8
Electronic Shell:
Energy Of First Ionization:  


No of Protons
Standard Potential:

Electron in Full Shell
Discoverd By: Discovered by McMillan in 1940

Electron in Partial Shell

FLW, Inc. provides ISO certified sales, service and calibration for physical measurement, test & control.
5672 Bolsa Avenue Huntington Beach, CA 92649 - USA - Ph (714) 622-2000 - Fax (714) 622-2001
This Day in History