You have three elements A, B, and C with the following electronegativity values: A-0.9, B-3.0, and C-3.5
You react the elements to form the substances AB, AC, and BC. What type of substances are all of these and what types of bonds are present in all of the substances? If any of the substances are ionic compounds, which element is the cation and which is the anion?

Question

You have three elements A, B, and C with the following electronegativity values: A-0.9, B-3.0, and C-3.5
You react the elements to form the substances AB, AC, and BC. What type of substances are all of these and what types of bonds are present in all of the substances? If any of the substances are ionic compounds, which element is the cation and which is the anion?

abb0t · Answer

If I remember correctly, if the difference in $X$ value is > 1.7, they are ionic bonds. 
$\sf \color{red}{X}$ in this case represents electronegativity, btw.

abb0t · Answer

Also, the atoms with the higher electronegativity values tends to be on the far right-hand side of the periodic table. You can base this by looking at fluorine, which has an $X$ value of approximately 4.0 (the highest of the elemtnts)

anonymous · Answer

so how do I figure out the substance it is?

joannablackwelder · Answer

If the compound is ionic, the element with lower electronegativity is the cation and the element with the higher electronegativity is the anion.