Promethium ek chemical element hae, jiske Chemical symbol Sm, atomic number 62 aur atomic mass 150.36 hae. Ii Lanthanide group ke ek member hae.

Atomic Structure
Symbol Sm
Atomic Number 6
Atomic Mass 150.36 g/mol
Periodic Table
Group 3
Row / Period 6
Element Category Transition dhaatu
Chhapa
PSamarium ke electron shell