Final answer:
An electron has a negative charge, has the opposite charge of a proton, and is smaller than an atom. However, it does not have a mass that is 1000 times greater than a proton.
Step-by-step explanation:
An electron has a negative charge and it has the opposite charge of a proton. It is also smaller than an atom. However, an electron does not have a mass that is 1000 times greater than a proton. In fact, it has a much smaller mass compared to a proton.
Learn more about Characteristics of an electron