Question

the correct name for mgf₂ is
o a. manganese difluoride
o b. monomagnesium difluoride
o c. magnesium fluoride
o d. magnesium difluoride

Explanation:

• For ionic compounds like \(MgF_2\), the naming rule is to write the name of the metal (magnesium, \(Mg\)) first.
• Then write the name of the non - metal (fluorine) with its ending changed to “-ide” (fluoride).
• Prefixes (like “mono - ”, “di - ”) are not used for ionic compounds (except for some transition metal oxides in special cases, but \(Mg\) is a main - group metal). \(Mg\) has a fixed charge (\(+ 2\)) in its compounds. So we don't need prefixes to indicate the number of ions as the charges of \(Mg^{2 +}\) and \(F^{-}\) (to balance the charge, there are two \(F^{-}\) ions for one \(Mg^{2+}\)) are used to form the compound formula. Also, the first letter of the metal name (magnesium) should be capitalized.

Answer:

C. Magnesium Fluoride