Calculate the average binding energy per nucleon of 24 12Mg. Answer in units of MeV/nucleon.

The average binding energy per nucleon of   is 8.00 MeV/nucleon

Explanation:

Here we have the molar mass of is 23.985042 amu

The mass of a proton = 1.007276 amu

The mass of a neutron = 1.008665 amu

From the notation, 1 Mg = has 12 protons and 12 neutrons

Therefore, we find the binding energy as follows;

= 12 × (1.007276) amu + 12 × (1.008665) amu - 23.985042 amu

= 24.191292 amu - 23.985042 amu = 0.20625 amu

1 amu = 931 MeV

Therefore, 0.20625 amu = 0.20625 amu × 931 MeV = 192.01875 MeV

The average binding energy per nucleon in   which has 24 nucleons, is thus;

= 192.01875 MeV ÷ 24 = 8.00078 MeV/nucleon ≈ 8.00 MeV/nucleon.

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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.