What is the atomic number of Promethium?

The atomic number of Promethium (Pm) is 61.

What is the atomic mass of Promethium?

The atomic mass of Promethium is 145.0 atomic mass units (u).

What group and period is Promethium in?

Promethium is in period 6, group 0 of the periodic table. It is a lanthanide element in the f-block.

How many valence electrons does Promethium have?

Promethium has 3 valence electron(s).

Promethium (Pm) — Atomic Number 61

Q: What is the electron configuration of Promethium?

The electron configuration of Promethium is [Xe] 4f5 6s2.

Promethium (Pm) — Atomic Number 61Radioactive, used in luminous paint.Promethium Properties

Atomic Number: 61

Symbol: Pm

Atomic Mass: 145.0 u

Category: lanthanide

Group: 0

Period: 6

Block: f-block

Electron Configuration: [Xe] 4f5 6s2

Valence Electrons: 3

Electronegativity: 1.13

Ionization Energy: 540.0 kJ/mol

Electron Affinity: 50.0 kJ/mol

Atomic Radius: 205.0 pm

Melting Point: 1315.0 K

Boiling Point: 3273.0 K

Promethium in the Periodic TablePromethium is a lanthanide element located in period 6, group 0 of the periodic table. It has the chemical symbol Pm and atomic number 61. The electron configuration of Promethium is [Xe] 4f5 6s2, giving it 3 valence electron(s).Interactive Promethium LearningExplore Promethium 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.