Which of the following best helps explain why an atom of Rb gas more easily loses an electron in a chemical reaction than an atom of Li gas? Α. Rb has a higher electronegativity than Li has.

B. The Rb atom has a greater number of valence electrons than the Li atom has.

C. The nucleus of the Rb atom has a greater number of protons and neutrons than the nucleus of the Li atom has.

D. In the Rb atom the valence electron is farther from its nucleus than the valence electron of Li is from its nucleus.​