How are atoms an example of unity? A. All atoms have the same arrangement of electrons.
B. All atoms react with other atoms the same way.
C. All atoms of one kind share common properties.
D. All atoms have the same number of neutrons.

just did the assignment and the answer was #1 +2 n

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.