I'm doing what's called "test repair" for my class where we correct the answers we got wrong on the test. In order to get points back, however, we have to explain WHY that answer is the correct one. Can someone help me with these?
39. Nuclear forces exist because the particles in the nucleus are:
b) close together
50. The deflection of cathode rays in Thomson's experiments was evidence of the ________ nature of electrons:
a) wave
b) charged
c) particle
I'm pretty sure the last one is c) particle [I originally put d) spinning, but it was wrong], but I'm not exactly sure how to explain it, and the other one as well. Any help is GREATLY appreciated!!
I'm not sure what the right answers are from your work. I assume that for the first one, b is the choice you SHOULD have chosen. If that is the case, then the explanation is that there are so many particles in such a small space that nuclear forces are necessary to keep the nucleus from breaking apart. After all, the protons have a positive charge and we know like charges repel so something must be there to keep the protons from flying everywhere. I hope this is what you need.
For #2. The deflection was proof of the charged nature of the electron. (You could make a case for particle being correct, too, because most of the literature makes a point that J. J. Thomson's experiment proved that electrons were particles; however, the word deflection makes me go with charged.) The electrons in the glass tube passed between charged plates on the outside of the glass tube. The electrons (particles) were deflected towards the + plate and away from the - plate, showing that they were negatively charged. In fact, Thomson went on to measure the charge to mass tatio (e/m).
Yes, the answer you gave me for the first one was exactly what I needed -- sorry I didn't make it clear enough as to what I needed :( lol.
I totally understand both explanations! Thanks!! :D
Of course! I'd be happy to help you explain the correct answers for these questions.
39. Nuclear forces exist because the particles in the nucleus are:
b) close together
To explain why this answer is correct, you need to understand the concept of nuclear forces. Nuclear forces, also known as strong forces or strong nuclear forces, are the attractive forces that hold the particles in an atomic nucleus together. These forces are extremely powerful, overcoming the electrostatic repulsion between positively charged protons in the nucleus.
In the case of this question, the answer involves understanding that nuclear forces exist because the particles in the nucleus are close together. Due to their proximity, the strong nuclear forces between the particles come into effect. If the particles were not close together, the strong forces would not be able to overcome the electrostatic repulsion, leading to an unstable nucleus.
50. The deflection of cathode rays in Thomson's experiments was evidence of the ________ nature of electrons:
a) wave
b) charged
c) particle
Based on your explanation, you believe that the correct answer is c) particle, which is indeed the correct choice.
To explain this, you need to recall Thomson's experiments using cathode rays. Cathode rays are streams of electrons emitted from a negatively charged electrode, known as the cathode, in a vacuum tube. These rays were deflected by electric and magnetic fields in Thomson's experiments.
The deflection of cathode rays provided evidence of the particle nature of electrons. The fact that the rays were deflected indicated that they possessed mass and carried an electric charge. The behavior of cathode rays in the presence of electric and magnetic fields supports the concept of charged particles being deflected, rather than the behavior expected from waves.
Therefore, based on the evidence from Thomson's experiments, we can conclude that the correct nature of electrons is that they are particles.
Remember, when explaining your answers for test repair, it's important to provide a clear understanding of the concepts involved and how the evidence supports the correct choice.