Chemical Bonding

Valence electrons are those in the outermost principal energy level. For example, sodium has one valence electron, and chlorine has seven valence electrons:  Na – 1s22s22p63s1, Cl – 1s22s22p63s23p5. The rest of the electrons in the lower energy levels are called core … Read more

The first thing we need to do when drawing a Lewis structure is determine the total number of valence electrons in the molecule. Remember, valence electrons are those in the outermost principal energy level. For example: Na – 1s22s22p63s1, Cl … Read more