The models below represent nuclear reactions. The atoms on the left of the equal sign are present before the reaction and the atoms on the right of the equal sign are produced after the reaction. Model 1: Atom 1 + Atom 2 = Atom 3 + energy
Model 2: Atom 4 = Atom 5 + Atom 6 + energy

Which of these statements is most likely correct about the two models?
Question 20 options:

Model 1 shows reactions in the nuclear power plants and Model 2 shows reactions in the sun.

Both models show reactions which use up energy in the sun.

Both models show reactions which produce energy in the sun.

Model 1 shows reactions in the sun and Model 2 shows reactions in the nuclear power plants.

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.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.