What is the atomic number of Actinium?

The atomic number of Actinium (Ac) is 89.

What is the atomic mass of Actinium?

The atomic mass of Actinium is 227.0 atomic mass units (u).

What group and period is Actinium in?

Actinium is in period 7, group 3 of the periodic table. It is a actinide element in the f-block.

How many valence electrons does Actinium have?

Actinium has 3 valence electron(s).

Actinium (Ac) — Atomic Number 89 | Soren Periodic Table

Q: What is the electron configuration of Actinium?

The electron configuration of Actinium is [Rn] 6d1 7s2.

Actinium (Ac) — Atomic Number 89Gives blue glow, neutron source.Actinium Properties

Atomic Number: 89

Symbol: Ac

Atomic Mass: 227.0 u

Category: actinide

Group: 3

Period: 7

Block: f-block

Electron Configuration: [Rn] 6d1 7s2

Valence Electrons: 3

Electronegativity: 1.1

Ionization Energy: 499.0 kJ/mol

Electron Affinity: 35.0 kJ/mol

Atomic Radius: 215.0 pm

Melting Point: 1323.0 K

Boiling Point: 3471.0 K

Actinium in the Periodic TableActinium is a actinide element located in period 7, group 3 of the periodic table. It has the chemical symbol Ac and atomic number 89. The electron configuration of Actinium is [Rn] 6d1 7s2, giving it 3 valence electron(s).Interactive Actinium LearningExplore Actinium 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.