8,700 B.C.
No clue who discovered it.
Answer:
D.) reducing agent
Explanation:
Oxidized chemicals gain electrons. In order to gain these electrons, another chemical must lose electrons. So, the chemical (which will be oxidized) acts as a reducing agent, causing the other chemical to be reduced and lose electrons.
Explanation:
proton number and neutron number sums up to form the mass number
Density always tells you the mass of exactly one unit of volume of a given substance.The answer is 68 g
