An electron is a particle that has negative electric charge, and positive mass (Electron
). It could have
energy energy in the sense that you can freely define a zero in potential energy. So, for example, we often define gravitational potential energy on the surface of Earth as zero and then use E
(as you may have learnt at school). The alternative is to define zero as far away in empty space, in which case all gravitational potential energy is negative. None of this means that a particle is
But it has
always existed, in the sense that at every moment in time
is has been there. If time itself is finite in the past that cannot possibly change that.