2 Al+ 3 CuO-> 1 Al2O3+ 3Cu
because it has ns1 electron configuration like the alkali metals
The best answer among the following choices would be A) since the other options are NOT nonrenewable energy sources.
The Sun is currently a main sequence star and will remain so for another 4-5 billion years. It will then expand and cool to become a red giant, after which it will shrink and heat up again to become a white dwarf. The white dwarf star will run out of nuclear fuel and slowly cool down over many billions of years.
