The electrical charge on an atom as a whole is

The electrical charge of an atom is determined by the number of electrons it has gained/lost. Electrons have a negative charge. We will let "e" be the amount of electrical charge carried by an electron.

If the atom has not lost or gained any electrons, it has a neutral, or zero, charge.

If the atom has 2 extra electrons, the atom is overall negatively charged with a charge equal to -2e.

If the atom has lost 2 electrons, the atom is overall positively charged with a charge equal to +2e.

If you want the charge quantities in Coulombs, use the conversion rate:

e = 1.6×10⁻¹⁹C

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.

3.2x10^7