Question

choose the name of a $mgcl_{2}$ compound.
a cupric bromide
b magnesium chloride
c manganese iodide
d caesium oxide

Explanation:

• Mg is the chemical symbol for magnesium.
• Cl is the chemical symbol for chlorine. In ionic compounds, when naming, the metal (magnesium here) is named first, and then the non - metal (chlorine) has its ending changed to “-ide”. So, \(MgCl_2\) is magnesium chloride.
• Cupric bromide would have the formula \(CuBr_2\) (since cupric refers to copper with a + 2 oxidation state and bromide is \(Br^-\)).
• Manganese iodide would have the general formula \(MnI_x\) (where \(x\) depends on the oxidation state of manganese).
• Caesium oxide has the formula \(Cs_2O\) (since caesium has a + 1 oxidation state and oxide is \(O^{2 -}\)).

Answer:

B. Magnesium chloride