Aluminum is a substance because it is a particular type of matter that has particular and unique properties. aluminum is a unique element with a place on the periodic table
Answer:
it is made up of rays of varying frequencies
D. powder residues.
the police and forensic chemists usually perform a qualitative test called GPR or gun powder residue. the residue sticks to the skin.
The oxidation number of chlorine in the Cl-<span> ion is -1.</span>
