What is the atomic number of Protactinium?

The atomic number of Protactinium (Pa) is 91.

What is the atomic mass of Protactinium?

The atomic mass of Protactinium is 231.04 atomic mass units (u).

What group and period is Protactinium in?

Protactinium is in period 7, group 0 of the periodic table. It is a actinide element in the f-block.

How many valence electrons does Protactinium have?

Protactinium has 3 valence electron(s).

Protactinium (Pa) — Atomic Number 91

Protactinium (Pa) — Atomic Number 91Rare actinide, used in research.Protactinium Properties

Atomic Number: 91

Symbol: Pa

Atomic Mass: 231.04 u

Category: actinide

Group: 0

Period: 7

Block: f-block

Electron Configuration: [Rn] 5f2 6d1 7s2

Valence Electrons: 3

Electronegativity: 1.5

Ionization Energy: 568.0 kJ/mol

Electron Affinity: 0.0 kJ/mol

Atomic Radius: 161.0 pm

Melting Point: 1841.0 K

Boiling Point: 4300.0 K

Protactinium in the Periodic TableProtactinium is a actinide element located in period 7, group 0 of the periodic table. It has the chemical symbol Pa and atomic number 91. The electron configuration of Protactinium is [Rn] 5f2 6d1 7s2, giving it 3 valence electron(s).Interactive Protactinium LearningExplore Protactinium in interactive 3D with the Soren Periodic Table. View Bohr model, quantum orbital model, nucleus inspector, and phase lab with temperature and pressure controls. Includes fun facts, real-world uses, and NCTB curriculum integration for Bangladeshi students.