Which property most directly influences the reactivity of an element in terms of its ability to attract electrons in a chemical bond?

• A. Electronegativity
• B. Density
• C. Atomic radius
• D. Molar mass

Answer: (A)

Verified step by step guidance

1. Understand that the question asks about the property that influences an element's ability to attract electrons in a chemical bond.
2. Recall that electronegativity is defined as the tendency of an atom to attract shared electrons in a chemical bond.
3. Consider other properties: density relates to mass per volume, atomic radius is the size of the atom, and molar mass is the mass of one mole of atoms; none of these directly describe electron attraction.
4. Recognize that electronegativity directly measures how strongly an atom pulls electrons toward itself when bonded.
5. Conclude that among the given options, electronegativity is the property that most directly influences an element's reactivity in terms of attracting electrons.