Why energy of electron in any shell is negative ??
wardahd1234:
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See electron is revolving around the nucleus hence it will not be wrong to say that the electron is bonded to the nucleus
hence the total energy of an electron is negative
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For a two object system,
If they repel each other when you move them towards each other, that means it takes work to do this, and the potential energy is positive.
If they attract each other when you move them towards each other, then potential energy of the two object system goes on decreasing.
Potential energy of a two charged object system at a particular orientation is defined as work done by external agent to bring the second body from infinity to desired point in presence of the field created by the first body. Now think the first body to be nucleus and the second body to be electron. Now to find the potential energy, according to potential energy defination I just said above, we need to being the electron from infinity to any desired location, lets say to a distance of "x" from the nucleus. As we have to bring electron from infinite that means initially electron is infinitely far away from nucleus and hence at zero potential.
If they repel each other when you move them towards each other, that means it takes work to do this, and the potential energy is positive.
If they attract each other when you move them towards each other, then potential energy of the two object system goes on decreasing.
Potential energy of a two charged object system at a particular orientation is defined as work done by external agent to bring the second body from infinity to desired point in presence of the field created by the first body. Now think the first body to be nucleus and the second body to be electron. Now to find the potential energy, according to potential energy defination I just said above, we need to being the electron from infinity to any desired location, lets say to a distance of "x" from the nucleus. As we have to bring electron from infinite that means initially electron is infinitely far away from nucleus and hence at zero potential.
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electrons are always marked negative hence electronic energy is always taken negative
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