7. What's the process that a spark represents? O A. A body with a strong positive charge is placed near a body with a strong negative charge and the electrons jump
between the two bodies
O B. A body with a strong positive charge is placed near a body with a neutral charge and the electrons jump between the
two bodies
O C. A body with a strong positive charge is placed near a body with a strong positive charge and the electrons jump
between the two bodies
OD. A body with a neutral charge is placed near a body with a strong negative charge and the electrons jump between the
two bodies

answer

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explanation:

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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explanation:

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