These are the noble gases which have a complete valence shell.
The maximum number of electrons that might be found in the valence shell is eight.
Neon is a noble gas, thus It has a full valence shell of eight electrons.
Valence electrons are the total amount of electrons on the outermost shell of an atom. Meaning if the last shell has two, the valence electrons are two. But a complete valence shell would hold eight.
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.
Generally, a compete valence shell holds EIGHT electrons.
All eight: the shell is full.
Argon has eight valence (outer) shell electrons. It is a Noble Gas so its valence shell is full (Octet Rule).
Eight valence electrons would complete the out shell. If the outer shell was complete it would still be called the same thing, however the charges would be different.
Valence electrons are the amount of electrons in the outermost electron shell. 8 valence electrons fill the outer shell making it completely stable.
All eight: the shell is full.
there are 3 valence electrons in the atom of aluminum
eight, thus the valence shell is full, which is why they do not normally bond