2 electrons in the only shell helium has.
2 electrons are found in the outermost electron shell of Helium. 8 electrons are found in the outermost electron shell of all other noble/inert gases.
only 2 electrons.
Hydrogen and Helium
it is Helium.
Yes. Valence electrons are the electrons found in the outermost shell / energy level
They have 8 valence electrons (except for helium which has 2 valence electrons).
Outermost shell
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.
The electrons found in the outermost shell (or energy level) are known as the valence electrons.
Electrons in the outermost shell of an atom/ion are called valence electrons
A duplet state is when an element has two electrons in it's outermost shell For example-Helium
the number of electrons found in the third shell of an helium atom are nill because its atomic number is 2