Chapter 20, Problem 25R

To determine

The forces that keeps particles of a nucleus together is to be explained.

Answer to Problem 25R

Strong forces.

Explanation of Solution

In nucleus proton and neutron are attracted with each other by strong forces. These forces are one of the four basis forces in nature. strong forces are depending upon size of nucleus. if size of nucleus is small than strong forces are stronger. If size of nucleus is large than strong forces are weaker.

Conclusion:

(b) is incorrect, because weak forces are not able to hold the nucleus tightly.

(c) is incorrect, because electromagnetic forces are force which are exerted by neutron and proton on each other but not enough to hold the nucleus tightly.

(d) is incorrect, as gravity is not able to keeps the particles of nucleus together.