do we have such a unit for energy? and if there was such a unit, what would be its relation with electron volt?

I guess they must be equel since they have the same charge but someone said it's 1840 times greater than electron volt.

Step one:

 

Write down the definition of 1eV.

th energy that's gained by an electron in 1v potential. Could you plz give me an straight answer, be sure that I've thought about it by myself but I want to make it sure, ok?

its the energy gained by accelerating an elementary charge through a potential difference of one volt. the definition does not specifically state an electron.

/Display ignorance

 

If we are accelerating a charge with mass, wouldn't the magnitude of that mass be important?

 

/ignorance.

/Display ignorance

 

If we are accelerating a charge with mass, wouldn't the magnitude of that mass be important?

 

/ignorance.

 

The dynamics of how that charge would accelerate would be different — the proton will go in the opposite direction as an electron, and it will have a different speed. But a fundamental charge that is accelerated through a 1V potential difference gains 1 eV of energy, by definition.

 

So the idea in the OP is right — the pV and eV would be the same, so there's no need for both.