What is the atomic number of Helium?

The atomic number of Helium (He) is 2.

What is the atomic mass of Helium?

The atomic mass of Helium is 4.0026 atomic mass units (u).

What group and period is Helium in?

Helium is in period 1, group 18 of the periodic table. It is a noble-gas element in the s-block.

How many valence electrons does Helium have?

Helium has 8 valence electron(s).

Helium (He) — Atomic Number 2 | Soren Periodic Table

Q: What is the electron configuration of Helium?

The electron configuration of Helium is 1s2.

Helium (He) — Atomic Number 2Inert noble gas, second most abundant element in universe.Helium Properties

Atomic Number: 2

Symbol: He

Atomic Mass: 4.0026 u

Category: noble-gas

Group: 18

Period: 1

Block: s-block

Electron Configuration: 1s2

Valence Electrons: 8

Electronegativity: Not available

Ionization Energy: 2372.3 kJ/mol

Electron Affinity: 0.0 kJ/mol

Atomic Radius: 31.0 pm

Melting Point: 0.95 K

Boiling Point: 4.222 K

Helium in the Periodic TableHelium is a noble-gas element located in period 1, group 18 of the periodic table. It has the chemical symbol He and atomic number 2. The electron configuration of Helium is 1s2, giving it 8 valence electron(s).Interactive Helium LearningExplore Helium 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.