Which ionic compound is expected to form from combining the following pairs of elements? yttrium and oxygen

i put YO but its wrong

YO won't do it.

Y is in group III(or group 3 depending upon the system your prof is using); therefore, I expect its most prominent valence to be +3. Oxygen is -2; therefore, I would think to look at Y2O3 for the oxide.

To determine the correct formula for an ionic compound formed between yttrium (Y) and oxygen (O), you need to consider the charges of each element.

Yttrium (Y) is a transition metal located in Group 3 of the periodic table. Transition metals usually have multiple possible charges. In this case, yttrium's common charge is +3.

Oxygen (O), on the other hand, is a non-metal located in Group 16 of the periodic table. Oxygen typically has a charge of -2 when it forms compounds.

To balance the charges and form a neutral ionic compound, you need to find the lowest common multiple of the charges of the two elements. In this case, the lowest common multiple of 3 and 2 is 6.

To achieve a balanced compound, you will need two oxygen atoms, each with a charge of -2, to balance the +3 charge of one yttrium atom. Therefore, the correct formula for the ionic compound formed between yttrium and oxygen is Y2O3.

So, the correct answer is Y2O3.