The correct answer is 42. I know this answer is right because i have already turned my assignment in and got it right.
They both have two electron shells. Period indicates number of shells.
Answer:
c) +2 to 0
Explanation:
SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge
Cu(s) is a solid metal and they have no charge, therefore it is zero
Copper undergoes Oxidation (gain of electrons)
Explanation:
sodium atom is neutral while sodium ion is a charged specie with a charge of +1