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 …

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

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 protons and two …

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). 1s 2. B. Cordero, V. Gómez, A.E. Platero-Prats, M. Revés, J. …

While helium normally has a 0 valence, it seems to have a weak tendency to combine with certain other elements. Means of preparing helium difluoride have been studied, and species such as HeNe and …

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 in the periodic …

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 the …

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.

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 …

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 …