p-orbitals.
Noble gases
Helium has 2 valence electrons. All other noble gases have 8 valence electrons.
This is the family of noble gases (group 18).
Noble Gas Configurations
Helium has 2 valence electrons. All other noble gases have 8 valence electrons.
The valence electron shell of noble gases is full.
it only fills the S sublevel
Noble gases
Group 18 contains eight valence electrons, namely the noble gases.
Helium has 2 valence electrons. All other noble gases have 8 valence electrons.
This is the family of noble gases (group 18).
Noble Gas Configurations
Helium has 2 valence electrons. All other noble gases have 8 valence electrons.
Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2 valence electrons) and have stable electronic configuration.
Valence electrons are electrons in the outermost shell (or outermost energy level or outermost orbital) in an atom. Noble gases have 8 valence electrons. But helium (a noble gas) has only 2 valence electrons.
Helium has only 2 valence electrons. The rest noble gases have eight.
The noble gases are elements with their valence band completely full of electrons: for helium this is 2 electrons, for all other noble gases this is 8 electrons. Because their valence band is already full they do not normally participate in chemical reactions.