Name the three particles that make up and atom and their electric charge.
Proton (+), Electron (-) and Neutron (neutral)
What two particles are found in the nucleus of the atom?
Proton and neutron.
Where are the electrons found in an atom?
Orbiting around the nucleus.
How does the mass of each sub-atomic particle compare?
The protons and neutrons have about the same mass. The electron is about 2000 times lighter than a proton.
What is the charge of the nucleus?
Positive