Question

proton. electron. neutron and alpha have same momentum. which have highest k.e​

Answer 1

Answer:

There are different ways of looking at kinetic energy. Sometimes, scientist consider them to mean the same thing.

But normally if you have two objects and one of them is noticeably more massive than the other one, then the kinetic energy of the lighter object is greater than the more massive one.

Protons and neutrons have nearly the same mass, and both are nearly 2,000 times more massive then electron. So electron’s kinetic energy, in this case, is much more than that of the other two, even with the same momentum energy.

Alpha Particles are positively charged particles with two protons and two neutrons and no electrons. So you cannot compare their proton and neutron’s kinetic energy to electrons, because they don’t have any electron.