Which option correctly describes the pattern of electronegativity and reactivity in metals?

Question

A. Both electronegativity and reactivity increase down a group
B. Both electronegativity and reactivity decrease down a group
C. Electronegativity increases down a group, and reactivity decreases down a group
D. Electronegativity decreases down a group, and rectivity increases down a group

Answer 1

The correct option that describes the pattern of electronegativity and reactivity in metals is:

D. Electronegativity decreases down a group, and reactivity increases down a group.

As you move down a group in the periodic table, the electronegativity of metals decreases because the increased distance between the nucleus and the valence electrons, as well as increased electron shielding, makes it harder for the nucleus to attract bonding electrons. Conversely, the reactivity of metals increases down a group because it becomes easier for the larger atoms to lose their outermost electrons due to the weaker attraction between the nucleus and these electrons.