Promethium and Neptunium Periodic Table
Symbol
Pm
  
Np
  
Group Number
Not Available
  
Not Available
  
Period Number
6
  
7
  
Block
f block
  
f block
  
Element Family
Lanthanide
  
Actinide
  
Space Group Name
Not Available
  
Pnma
  
Space Group Number
Not Available