What are the charge and mass of an electron?

What are the point charges?

What is the charge of an electron, proton and a neutron ?

What is the mass of electron?

What is the nature of charge carried by an electron?

What is the ratio between mass of proton and electron?

A charged particle is moving in a magnetic field of strength B perpendicular to the direction of the field. If q and m denote the charge and mass of the particle respectively. Then the frequency of rotation of particle is

A charged particle is moving in a magnetic field of strength B perpendicular to the direction of the field.If q and m denote the charge and mass of the particle respectively, then the frequency of rotation of the particle is

What are the factors that affect electron affinity ?

The rest mass energy of electron is