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Helium - Wikipedia 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
Helium (He) - Periodic Table 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 neutrons in its nucleus, and two electrons in one shell It is located in group eighteen, period one and block s of the periodic table
Helium | Definition, Properties, Uses, Facts | Britannica Helium, chemical element, inert gas of Group 18 (noble gases) of the periodic table The second lightest element, helium is a colorless, odorless, and tasteless gas that becomes liquid at -268 9 degrees Celsius
Atomic Number of Helium He 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 boiling point is -268,9 °C
Helium (He) - Periodic Table Helium (He) 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 gases)
Helium | He (Element) - PubChem 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)
Periodic Table of Elements: Los Alamos National Laboratory 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 He-4II (below it) is unlike any other known substance
Helium — Science Learning Hub Its official symbol is He, and its atomic number is 2, which means it has two protons in its nucleus Helium was named after Helios – the Greek Titan of the Sun – because it was first observed when analysing sunlight during a solar eclipse in 1868 A common use of helium is to fill party balloons Balloon image Belchonock, 123RF Ltd