Answer:
nickel
It also tells you the number of electrons that the element has in its outside shells. If the atomic number of nickel is 28 then every atom of nickel has 28 protons in its nucleus and 28 electrons outside the nucleus.
Explanation:
Answer: I think it's C
Explanation: I hope this helps (Sorry if it doesn't)
The one with higher mass has a higher density because it fits more mass into the same amount of space (volume).
D.
both are stated to be in aqueous solutions by the (aq)
