Answer:
NOUN
a thing that is composed of two or more separate elements; a mixture
Explanation:
basically a mixture
The reddish brown powder consist of copper ions(when mixed in H2O ) which conduct electricity.
I believe that this atom is chlorine and the atom has an overall charge of zero.
Chlorine is chemical element which is atomic number 17 in the periodic table. Each chlorine atom has 17 protons (positively charged) in the nucleus balanced by 17 electrons (negatively charged) in the energy shells ( thus an overall charge of zero)