I am a little confused by your question. I asked my team for an answer……and here it was
Thanks team. I would like to add a little bit more to your answer
Firstly the electron is a very, very small particle, it has a radius of 0nly 2.8×10–15 m. It is very, very small. That is an unimaginable small size. Associated with this very small particle is an actual , very small electrical charge of about 1.6x 10–19 volt (V).
So in reality when you are talking about the total charge of seven electrons you are only talking about 7 x 1.6x 10–19 volt (V).
Sorry for this answer. I think it complicates things …stick to what my team member says. In reality when you are talking about the charges on seven electrons as 7- you are talking about the total charge that about 7 x 1.6 x 1019 electrons will give you .