Which of the following elements tend to be radioactive? check all that apply. a. mgb. puc. fed. th

Explanation:

An atom which has greater difference in the number of number of protons and neutrons will be unstable in nature. This is because then nuclear binding energy will not be strong enough to hold the neutrons and protons together.

For example, and are both radioactive in nature due to large difference in the number of protons and neutrons.

Whereas for and there is not much difference in the number of protons and neutrons.

Thus, we can conclude that both Pu and Th elements tend to be radioactive in nature.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.