These questions are a quick overview of the topics in this lesson. You are not expected to know this material before hand. The questions are intended to help you focus on material in the lesson. After you have studied the lesson you should be able to answer these and even more complicated questions.
Neutrons are subatomic particles with a positive charge.
The atomic nucleus contains electrons and neutrons. All atoms of the same element have the same number of protons. Protons are more massive than neutrons. Protons repel electrons because they have the same charge. All electrons have a relative minus one charge.