First of all there is no such thing a a valence neutron. However there are valence electrons.Valence electrons are the electrons of the outer most layer or shell called valence shell. Based on a Bohr diagram or Lewis structure you can see that Helium has 2 valence electrons.
Helium has 8 valence electrons. It is a noble gas. none = 0
Helium has 2 valence electrons.
As helium is located in group 18, it has no valence electrons.
Radium has one valence electron.
Helium-3 has 1 neutron and 2 electrons. Helium-4 has 2 neutrons and 2 electrons.
2
8
Helium has two protons and two neutrons (and two electrons).
2 valence electrons
Helium has 2 valence electrons.
The valence of the element helium is 0.
Helium has two valence electrons. It is the only noble gas not to have eight valence electrons. Helium has the electronic configuration 1s2.The Noble gases have eight valence electrons in their outer shell.