The proton’s positive charge is equal and opposite to the negative charge on an electron, meaning a neutral atom has an equal number of protons and electrons. Charge of proton depends upon the number of electron and proton it contains. In this topic, we will teach you about mas and charge of a proton . Protons are positively charged particles in the nucleus of an atom. Learn about their mass, discovery, properties and FAQs on protons, electrons and neutrons. What is a proton , who discovered it, & what is it made of: also learn its symbol, size, mass, charge , how to find their number in an atom with example & picture