What is the atomic number of Astatine?

The atomic number of Astatine (At) is 85.

What is the atomic mass of Astatine?

The atomic mass of Astatine is 210.0 atomic mass units (u).

What group and period is Astatine in?

Astatine is in period 6, group 17 of the periodic table. It is a halogen element in the p-block.

How many valence electrons does Astatine have?

Astatine has 7 valence electron(s).

Astatine (At) — Atomic Number 85 | Soren Periodic Table

Astatine (At) — Atomic Number 85Rarest naturally occurring element, radioactive.Astatine Properties

Atomic Number: 85

Symbol: At

Atomic Mass: 210.0 u

Category: halogen

Group: 17

Period: 6

Block: p-block

Electron Configuration: [Xe] 4f14 5d10 6s2 6p5

Valence Electrons: 7

Electronegativity: 2.2

Ionization Energy: 899.0 kJ/mol

Electron Affinity: 270.0 kJ/mol

Atomic Radius: 127.0 pm

Melting Point: 575.0 K

Boiling Point: 610.0 K

Astatine in the Periodic TableAstatine is a halogen element located in period 6, group 17 of the periodic table. It has the chemical symbol At and atomic number 85. The electron configuration of Astatine is [Xe] 4f14 5d10 6s2 6p5, giving it 7 valence electron(s).Interactive Astatine LearningExplore Astatine 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.