Which of the following is a CORRECT guideline when writing the IUPAC chemical name of a binary compound from a chemical formula?
A
Binary compounds generally end with an –ite.
B
Binary ionic compounds are always named using the positive ion followed by the negative ion.
C
The metal anion is named first, followed by the non-metal cation.
D
Roman numerals are used to indicate the number of each atom in the formula.

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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.