Helium (from Ancient Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the …

Element Helium (He), Group 18, Atomic Number 2, s-block, Mass 4.003. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Dec 4, 2025 · Helium was discovered in the gaseous atmosphere surrounding the Sun by the French astronomer Pierre Janssen, who detected a bright yellow line in the spectrum of the solar …

Helium atoms have 2 electrons and the shell structure is 2. The ground state electronic configuration of neutral helium is 1s2 and the term symbol of helium is 1S0.

Chemical element, Helium, information from authoritative sources. Look up properties, history, uses, and more.

Helium is a chemical element of the periodic table with chemical symbol He and atomic number 2 with an atomic weight of 4.0026 u and is classed as a noble gas.

Helium (pronunciation: HEE-lee-em) is a colorless, odorless element classified as a non-metal, belonging to the group of inert gases in the periodic table and is represented by the chemical symbol …

Helium (from Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble …

Nov 21, 2020 · Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The chemical symbol for Helium is He.

Name: Helium Symbol: He Atomic Number: 2 Atomic Mass: 4.002602 amu Melting Point: -272.0 °C (1.15 K, -457.6 °F) Boiling Point: -268.6 °C (4.549994 K, -451.48 °F) Number of Protons/Electrons: 2 …