What is the atomic number of Caesium?

The atomic number of Caesium (Cs) is 55.

What is the atomic mass of Caesium?

The atomic mass of Caesium is 132.91 atomic mass units (u).

What group and period is Caesium in?

Caesium is in period 6, group 1 of the periodic table. It is a alkali-metal element in the s-block.

How many valence electrons does Caesium have?

Caesium has 1 valence electron(s).

Caesium (Cs) — Atomic Number 55 | Soren Periodic Table

Q: What is the electron configuration of Caesium?

The electron configuration of Caesium is [Xe] 6s1.

Caesium (Cs) — Atomic Number 55Atomic clock standard, photoelectric cells.Caesium Properties

Atomic Number: 55

Symbol: Cs

Atomic Mass: 132.91 u

Category: alkali-metal

Group: 1

Period: 6

Block: s-block

Electron Configuration: [Xe] 6s1

Valence Electrons: 1

Electronegativity: 0.79

Ionization Energy: 375.7 kJ/mol

Electron Affinity: 45.5 kJ/mol

Atomic Radius: 298.0 pm

Melting Point: 301.7 K

Boiling Point: 944.0 K

Caesium in the Periodic TableCaesium is a alkali-metal element located in period 6, group 1 of the periodic table. It has the chemical symbol Cs and atomic number 55. The electron configuration of Caesium is [Xe] 6s1, giving it 1 valence electron(s).Interactive Caesium LearningExplore Caesium 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.