An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass is the proton and the neutron.
Every atom's nucleus contains a proton, which is a subatomic particle. The particle possesses the positive electrical charge that is equal to the electrons but opposite.
A neutron is just a subatomic particle contained in every atom's nucleus except basic hydrogen.
Mass of proton = 1.674 × [tex]10^{-27}[/tex] kilogram
Mass of neutron = 1.674 × [tex]10^{-27}[/tex] kilogram
To know more about proton and neutron.
https://brainly.com/question/13131235.
#SPJ2
