Final answer:
A bond formed when the electronegativity difference between two atoms is 1.0 to 2.0 is typically a polar covalent bond, characterized by unequal sharing of electrons and partial charges on the atoms.
Step-by-step explanation:
When the difference in electronegativity between two types of atoms is in the range of 1.0 to 2.0, this typically leads to the formation of a polar covalent bond. This type of bond occurs when atoms share electrons but do so unequally, resulting in one atom having a partial negative charge and the other a partial positive charge. In general, when the electronegativity difference is less than 0.5, a nonpolar covalent bond is formed, and if the difference is greater than 1.9, an ionic bond is likely, although there are exceptions based on the specific atoms involved.