Atoms of element X (with 2 electrons in the outer shell). combine with atoms of Y (with 7 electrons in the outer shell). Which of the following statements i...

Answer Details

The false statement is "contains X2+ ions". When atoms of X (with 2 electrons in the outer shell) combine with atoms of Y (with 7 electrons in the outer shell), they are likely to form an ionic bond. In this bond, the X atom loses 2 electrons to become a cation with a 2+ charge (X2+), and the Y atom gains one electron to become an anion with a 1- charge (Y-). Therefore, the compound formed contains Y- ions but not X2+ ions, making statement 3 false. The compound formed will have a formula of XY because the cation (X2+) and anion (Y-) combine in a 1:1 ratio to form an electrically neutral compound.