Question

If atom X had 3 valence electrons and atom Y had 7 valence electrons, the correct chemical formula for the ionic compound they would form is Choices: A) XY3 B) X3Y6 C) X2Y3 D) X3Y7

Answer 1

A) XY3

In both of the atom, they want to have 8 valence electrons on the outer shell so they can become stable.