Question
Asked Mar 21, 2019
4.   What is the correct formula for the ionic compound that would form between Al and F?
A   Al F
B   Al F2
C   Al F3
D   Al3F

 

check_circleExpert Solution
Step 1

The elements are Aluminum and Fluorine.

The chemical symbols for these elements are Al and F.

Among these, Al is metal F is non-metal. Thus, Al must forms cation and F forms anions.

Assign oxidation states to these two elements based on the group number of the elements.

Step 2

Thus, ionic forms of the elements is Al3+  and F-

 The sum of charges of cations and anions is not equal.

To balance the charges, write charge of anions as subscript of th...

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