If solid nickel metal were mixed with cobalt ion, what would you expect to see happen?
A. solid cobalt would form
B. nickel ions would form
C. cobalt would be oxidized
D. nothing

D. nothing

Explanation:

Cobalt is one of the abundant in the Earth with a chemical configuration of

[Ar] 4s²3d⁷ and has oxidation states Co(ii) and Co(iii).It has two oxidation numbers +2 and +3.In nature Cobalt is found together with iron, nickel, silver and arsenic. It mostly resembles nickel and its significant application is in production of alloys such as Stellite.

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).