Students in a chemistry class are drawing molecular models based on molecular formulas they are given by the teacher. What atom or group of atoms is missing from each molecular model? Place the missing atom or group of atoms in the correct location to
complete the model. Not all pieces must be used.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.