Question

multiple choice 15 points
what is the formula for gold (iii) nitride?
aun₃
ag₃n
aun
au₃n

Explanation:

Step1: Determine the charge of Gold (III)

Gold (III) has a charge of \(+3\), so \(Au^{3+}\).

Step2: Determine the charge of nitride

Nitride ion has a charge of \(-3\), so \(N^{3 -}\).

Step3: Use the criss - cross method

For ionic compounds, we use the criss - cross method. The magnitude of the charge of one ion becomes the subscript of the other ion. Since the charge of \(Au^{3+}\) is \(+3\) and the charge of \(N^{3 -}\) is \(-3\), when we criss - cross, \(\frac{Au^{3+}}{N^{3 -}}\), the subscripts are \(\frac{3}{3}=1\).

Answer:

C. AuN