So if we take a look at this example question, it says, which of the following statements is false? So we're looking to see what is not true.
- A. The nucleus is composed of protons and neutrons. Well, we know that's true, we've talked about that at the very beginning. The nucleus has protons and neutrons, and spinning around the nucleus are the electrons. So this is true.
- B. When the nuclear force is less than the electrostatic force, then the nucleus will not remain intact. Alright. So let's go up above. We said that the nuclear force holds it together, the electrostatic force tries to pull it apart. We said that the nucleus will be held together as long as the nuclear force is greater than the electrostatic force. But what happens if that's not true? Well, if the nuclear force is less than the electrostatic force, it makes sense that the nucleus would not be held together. So this is also true. Right? Because we're saying the opposite of what we said up above.
- C. The nucleus has an overall neutral charge. Well, the nucleus houses what? Positive protons and neutral neutrons. So I'm just doing shorthand, proton \( p \) has a positive charge. Neutrons \( n \) have no charge. Usually, we denote that with a 0 or circle here to show that it has no charge. Think about it. We have positive charges only within the nucleus. There's no other charges within it. So the nucleus overall should have a positive charge, not a neutral charge. So this is false.
- D. When the nuclear force is greater than the electrostatic force, then the nucleus will remain intact. Well, that's exactly what we said up above. If the nuclear force is greater than the electrostatic force, then the nucleus is stable and will be held together. So just remember, when it comes to the nucleus, we have these two forces that are opposing one another trying to be the primary force, and this can either lead to the stability of the nucleus or have it fall apart.