Which half-reaction is most easily oxidized?
O A.
Al3+ + 3e → Al = -1.66 V
O B. Cu2+ + 2e → Cu = 0.34 V
C. Fe3+ + € → Fe2+ = 0.77 V
OD. Nat + e → Na = -2.71 V
O E.
Pb2+ + 2e → Pb = -0.13 V

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).