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Helium compounds. Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or at least under normal conditions. [1] Helium's first ionization energy of 24.57 eV is the highest of any element. [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 gas group in the periodic table.
Data Zone. Show more, including: Heats, Energies, Oxidation, Reactions, Compounds, Radii, Conductivities. Nasa: Ionized helium atoms at about 60,000 °C in the Sun’s chromosphere emit the ultraviolet light seen in this image.
helium (He), chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element (only hydrogen is lighter), helium is a colourless, odourless, and tasteless gas that becomes liquid at −268.9 °C (−452 °F).
Helium is also a gas, but is very different from hydrogen because it doesn’t take part in any chemical reactions. Helium is used for party balloons because it is lighter than air. The first 94...
17 wrz 2024 · Here are six noteworthy compounds involving helium, although it’s important to note that these are not typically encountered in everyday chemistry: Helium Hydride (HeH⁺) Equation: He+H⁺→HeH⁺ Conditions: Formed in high-energy environments like the interstellar medium. Helium-Nitrogen Compound (HeN) Equation: He+N₂→HeN
Introduction. - Helium is the second lightest and second most abundant element in the observable universe. - It plays a vital role in various industries including healthcare, aerospace, and technology. - Helium is a colorless, odorless, and tasteless gas that belongs to the noble gases group in the periodic table. Historical Background.
