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 …

Helium (He) Helium is the 2nd element in the periodic table and has a symbol of He and atomic number of 2. It has an atomic weight of 4.00260 and a mass number of 4. Helium has two …

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

Periodic Table element Summary Helium Helium is a chemical element with symbol He and atomic number 2. Classified as a noble gas, Helium is a gas at 25°C (room temperature).

May 18, 2015 · Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group …

Atomic Number of Helium is 2. Chemical symbol for Helium is He. Number of protons in Helium is 2. Atomic weight of Helium is 4.002602 u or g/mol. Melting point of Helium is -272,2 °C and its …

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 noble gas and is part of group 18 (noble …

Seven isotopes of helium are known: Liquid helium (He-4) exists in two forms: He-4I and He-4II, with a sharp transition point at 2.174K. He-4I (above this temperature) is a normal liquid, but …

Nov 21, 2020 · Chemical element Helium has atomic number 2. A chemical symbol is a notation of one or two letters representing a chemical element.

Helium is a chemical element with atomic number 2 which means there are 2 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is …