Select all the correct answers. Why do the atoms in a piece of copper metal have no net charge?

1.The charges of the positive and negative copper ions cancel each other out.

2.The number of electrons surrounding each copper nucleus doesn’t change.

3.Copper atoms can’t lose electrons without a substance present to gain electrons.

4.When a copper atom loses electrons, it also loses a corresponding number of protons.

5.The copper atoms exchange neutrons instead of electrons.