Practice Questions

1.Explain why atoms are electrically neutral

Proton has a +1 charge, electron -1 charge. In an atom, there are equal numbers of protons and electrons. So, the charges cancel out and the atoms are electrically neutral.

2. State the charge on an ion, if the atom loses two electrons

2+

3. An ion contains 7 protons, 10 electrons and 7 neutrons. State the charge on the ion

3-