Identify the reagent that separates fe3+ from ni2+. explain the chemistry of the separation

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

An experimental procedure requires a 10 ml of acid to be dissolved

In a copper wire, a temperature increase is the result of which of the following