What is electronegativity?

• A. The strength of an acid in a solution
• B. The capacity of an atom to repel electrons
• C. The ability of an atom to attract electrons in a bond
• D. The measure of atomic radius in a molecule

Answer: (C)

Electronegativity refers to the ability of an atom to attract and hold onto electrons when it is involved in a chemical bond. It is a fundamental property of elements that influences how they interact with one another to form compounds. The more electronegative an atom is, the stronger its pull on the electrons in a bond with another atom.

In the context of molecular interactions, this property plays a crucial role in determining whether a bond is ionic or covalent, as well as influencing molecular polarity. For instance, in a polar covalent bond, the more electronegative atom will attract the shared electrons more closely toward itself, leading to a partial negative charge, while the less electronegative atom will carry a partial positive charge.

Understanding electronegativity is essential for predicting and explaining the reactivity and properties of different chemical species during reactions.