How does the currently accepted model of the nucleus provide evidence of the existence of the strong nuclear force?
a)the protons have like charges and should repel, so to stay near each other in the nucleus, there is a strong force holding them together.
b)the electrons have like charges and should repel each other, which is why they are scattered in the electron cloud.
c)the protons and neutrons have opposite charges
ach other, so to keep them apart, there must be a strong force in the nucleus.
d)the particles in the nucleus are separated
ty
force that keeps them apart.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

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