Which elements have the greatest tendency to act as reducing agents?

Question

metals

nonmetals

noble gases

halogens

Answer 1

Oxidation is loss of electrons; therefore, these are reducing agents.
For example, Zn ==> Zn^2+ + 2e so these (metals) would be reducing agents.

non metals, like Cl2.
Cl2 + 2e ==> 2Cl^- so these are oxidizing agents.

Noble gases very reactive at all.

See Cl2 for halogens.