Q. What is the charge of each of the particles?

The e is a unit of charge and it isn't an SI unit of charge but it is a valid unit of charge. In expressions of this unit of charge what is the charge of each of the particles listed below?

The "e" is definitely a unit of charge. Occasionally people get mixed up on the sign because the long name for the e is the electron. It is the name of a unit of charge equal to +1.6 × 10^-16C. For the reason that unit of charge has the same name as a particle which has a negative charge folks habitually make the mistake of thinking that the unit of charge is a negative amount of charge. It is not. The e (unit of charge) is a positive amount of charge. The particle in question explicitly the electron has an amount of charge equal to -1e and the proton has +1e. It was the charge lying on these particles that led to the definition of the unit. To evade the confusion it is best to avoid the use of the long name for the unit of charge. Just call it the "e". The hydrogen nucleus is a solitary proton. Therefore the charge of the hydrogen nucleus is the charge of one proton namely +1e. A helium nucleus contains of two protons and two neutrons. Neutrons have no charge and every proton has a charge of +1e. Therefore the charge of a helium nucleus is +2e.