Question

two elements, x and y, have electronegativities of 3.0 and 0.9 respectively. which statement best explains the type of bond expected to form between x and y? an ionic bond will form because the electronegativity difference is large, causing one atom to transfer electrons to the other. a nonpolar covalent bond will form because the electronegativity difference is small, so electrons are shared equally. a metallic bond will form because both atoms have low electronegativity and freely share valence electrons. a polar covalent bond will form because the electronegativity difference is moderate, creating partial charges on each atom. clear my selection

Explanation:

Ionic bonds form when there is a large difference in electronegativity between two atoms, causing one atom to transfer electrons to the other. Here, the electronegativity difference between X (3.0) and Y (0.9) is \(3.0 - 0.9=2.1\). A difference of 1.7 or more (by the Pauling scale, a general rule - though it's a simplification) is often considered for ionic bond formation. Metallic bonds involve metal atoms sharing valence electrons freely. Non - polar covalent bonds have an electronegativity difference close to zero. Polar covalent bonds have a moderate electronegativity difference (usually between 0.5 - 1.7).

Answer:

An ionic bond will form because the electronegativity difference is large, causing one atom to transfer electrons to the other.