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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, tasteless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table.
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 is a noble gas with atomic number 2 and atomic weight 4.002602. It was discovered in the Sun's spectrum and on Earth by radioactive decay of uranium.
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 neutrons in its nucleus, and two electrons in one shell.
Helium is the second most abundant element in the universe and has the lowest melting and boiling points of any element. Learn about its history, sources, properties, isotopes, and uses from the Los Alamos National Laboratory.
Helium is a noble gas with the chemical symbol He and the atomic number 2. It is colourless, odourless, tasteless, and completely unreactive. It is the second most abundant and second-lightest element in the universe, after hydrogen. It is used in various fields such as welding, rocket propulsion, gas chromatography, and cryogenics.
Helium is a noble gas with symbol He and atomic number 2, discovered by Ramsay, Lockyer and others in 1895. Learn about its physical and chemical properties, electron configuration, shell diagram, and more on Wikipedia.
