the structure of atoms

Question 1

whats the location, mass and the charge of a proton

Answer 1

nucleus, 1, +1

Question 2

whats the location, mass and the charge of a electron

Answer 2

orbiting the nucleus, 1/840, -1

Question 3

whats the location, mass and the charge of a neutron

Answer 3

nucleus ,1, 0

Question 4

whats a isotope

Answer 4

they have the same number of electrons and protons but different number of neutrons