Which sequence of coefficients will balance the following equation?
Na (s) + O2 (g) → 2Na20 (s).

option c. 4,1,2

Explanation:

No. of atoms of each element in reactant is equal to that of products

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.