Answer:
number of Protons=16
number of Neutrons=16
number of electrons=32
Explanation:
Tip:-
<em><u>Always the number of protons = the number of neutrons.</u></em>
<em><u>Add them and you will get the number of electrons.</u></em>
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PART A)
Electrostatic potential at the position of origin is given by

here we have



now we have


Now work done to move another charge from infinite to origin is given by

here we will have

so there is no work required to move an electron from infinite to origin
PART B)
Initial potential energy of electron




Now we know



now by energy conservation we will have
So here initial total energy is sufficient high to reach the origin
PART C)
It will reach the origin
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