Mark Brainliest please
Answer :
electron dot diagram
Explanation
the valence electrons of an atom are the electrons located in the highest occupied principal energy level. Valence electrons are primarily responsible for the chemical properties of elements. The number of valence electrons can be easily determined from the electron configuration. Several examples from the second period elements are shown in the Table below.
lithium 1s22s1 1 valence electron
beryllium 1s22s2 2 valence electrons
nitrogen 1s22s22p3 5 valence electrons
