Question

why are there only 8 electrons in valence shell? ​

Answer 1

Answer:

Explanation:

Referring to the octet rule, atoms attempt to get a noble gas electron configuration, which is eight valence electrons. Sodium has one valence electron, so giving it up would result in the same electron configuration as neon. Chlorine has seven valence electrons, so if it takes one it will have eight (an octet).

Answer 2

Answer:

because it bond a hybrid atoms