Elementary charge introduction
Basic charge is also called "basic charge" or "elementary charge". Among all kinds of charged particles, the amount of electron charge is the smallest. People call the smallest charge the elementary charge, which is also one of the basic constants of physics. The symbol e is commonly used. The basic charge e = 1.60217663410 × 10-19 Coulomb (usually taken as e = 1.6 × 10-19C) is the amount of charge carried by an electron or a proton. The charge carried by any charged body is an integer multiple of or equal to e.