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

Question

A. Reactivity increases down a group, and electronegativity decreases down a group
B. Both reactivity and electronegativity decrease down a group
C. Reactivity decreases down a group, and electronegativity increases down a group
D. Both reactivty and electronegativity decrease up a group

Answer 1

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

C. Reactivity decreases down a group, and electronegativity increases down a group.

In nonmetals, as you move down a group in the periodic table, the reactivity typically decreases because the ability to gain electrons decreases due to increased distance from the nucleus and increased electron shielding. On the other hand, electronegativity generally increases as you move up a group because the atoms are smaller and have a stronger attraction to bonding electrons.

However, note that the trend in reactivity can differ between groups of nonmetals, as seen in the halogens (Group 17), where reactivity generally increases down the group, while for oxygens and other nonmetals, reactivity can decrease down the group. But since the option mentions both reactivity and electronegativity together, it's important to note specific groups rather than the general trend. Therefore, the best among the listed options is C, but it could vary depending on nonmetal types.