Question

What subscripts would properly complete the formula unit Al_N_?

Answer 1

The subscripts that would properly complete the formula unit would be 1 for both. This compound is  called aluminum nitride. It is a ceramic type of material that which has outstanding properties. Hope this answers the question. Have a blessed day.

Answer 2

Answer: The value of subscript to complete the given formula will 1 and 1 for both the elements

Explanation:

$AL_xN_y$

In the given formula Al is the symbol of aluminium metal and N is symbol of nitrogen atom.

Aluminium has tendency to looses three electrons from its valence shell to attain noble gas configuration where as nitrogen atom has tendency to gain three electrons to attain noble gas configuration. By loosing three electrons aluminium atom will get converted into aluminium cation with 3+ charge ($AL^{3+}$)and by gaining three electrons nitrogen atom will get converted into nitride ion ($N^{3-}$). So, if the transfer of three electrons from aluminum atom to nitrogen atom occurs, the compound we will obtain will be AlN that is aluminum nitride.

Hence, the value of subscript to complete the given formula will :x=1, y=1