Question

19

Answer 1

Proton: Its electrical charge is +1, its mass is 1, it's found in the nucleus

Neutron: Its electrical  charge is 0, its mass is 1, it's found in the nucleus

Electron: Its electrical charge is -1, its mass is negligible, it's found outside the nucleus

Explanation:

Atoms consist of three types of particles:

• Proton: the proton is found in the nucleus of the atom, and it has a positive electric charge, equal to $+1.6\cdot 10^{-19}C$ (expressed in units of fundamental charge, it has a charge of +1). Its mass is $1.67\cdot 10^{-27}kg$, while its mass expressed in atomic mass units is 1 a.m.u
• Neutron: the neutron is also found in the nucleus of the atom, and it has no electric charge. Its mass is similar to the mass of the proton (slightly larger), and neutrons and protons are held together in the nucleus by the presence of the strong nuclear force
• Electron: the electron orbits around the nucleus, far away from it. It has negative electric charge, opposite to that of the proton ($-1.6\cdot 10^{-19}C$, or -1 in units of fundamental charge). Its mass is much lower than that of the proton, approximately 1800 times smaller, so it can be considered as negligible.

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