Protactinium

Protactinium ek chemical element hae, jiske chemical symbol Pa, atomic number 91 aur aomic mass 231.04 hae . Periodic table me ii uu chemical elements ke group me hae jiske Actinoids bolaa jaae hae.

Atomic Structure
Symbol	Pa
Atomic Number	91
Atomic Mass	231.04g/mol
Periodic Table
Group	3
Row / Period	7
Element Category	Transition dhaatu
Chhapa
Protactinium ke electron shell