Periodic table element summary helium helium is a chemical element with symbol he and atomic number 2. Number of protons in helium is 2. Atomic weight of helium is 4.002602 u or g/mol.
Helium is atomic number 2 on the periodic table, with the element symbol he.
It has symbol he and atomic number 2. Chemical symbol for helium is he. 'sun') is a chemical element; Classified as a noble gas, helium is a gas at 25°c (room temperature).
It is a colorless, flavorless gas, best known for its use in filling floating balloons. Sources, facts, uses, scarcity (sri), podcasts, alchemical symbols, videos and images. 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. It has an atomic weight of 4.00260 and a mass number of 4.
Atomic number of helium is 2.
Helium is a chemical element with the symbol he and atomic number 2. Seven isotopes of helium are known: Helium (he) helium is the 2nd element in the periodic table and has a symbol of he and atomic number of 2.
