What is the atomic number of Protactinium?

Protactinium (Pa) has atomic number 91.

What is the symbol for Protactinium?

The chemical symbol for Protactinium is Pa.

The standard atomic weight of Protactinium (Pa) is 231.04.

91Pa

프로트악티늄 · プロトアクチニウム

Actinide

Atomic number91

ElementPa — Protactinium

Atomic mass231.04

CategoryActinide

Group3

Period7

Electron config[Rn] 5f2 6d1 7s2

Shells2,8,18,32,20,9,2

State (RT)Solid

Melting pt1568°C

Boiling pt4027°C

Electronegativity1.5

Discovered1913

Main usesResearch only

2 · 8 · 18 · 32 · 20 · 9 · 2

Bohr model