Question

3 6 how are electrons arranged in an atom answers

Answer 1

alence electrons are the electrons located in the outermost shell of an atom. For example, oxygen has six valence electrons and bromine has seven. Sodium has one valence electron and magnesium has two.

You can get the number of valence electrons from the electron configuration. For example, carbon has this configuration:

1s2 2s2 2p2

and it has four valence electrons. The outermost shell is shell #2 and it holds 4 electrons, two in the 2s and two in the 2p.