Under the right conditions, sodium (Na) and chlorine (Cl) can chemically combine to form sodium chlorine. Which of the following best explains how sodium and chlorine are able to create sodium chlorine?
A: sodium and chlorine exchange neutrons between eachother when they combine
B: electrons are transferred between sodium and chlorine when they combine
C: extra protons are created when both sodium and chlorine combine
D: The nucleus of both sodium and chlorine combined together