Which 3 subatomic particles make up an atom?

Structure of an atom Nucleus - center or core which contains protons and neutrons Proton is a positively (+) charged particle in the nucleus Neutron is neutral. It has no charge. Electrons are very tiny particle that surround the nucleus and is negatively (-) charged Thomson's model - first scientist to suggest an atom contains smaller particles.

He discovered the negatively charged electrons. Rutherford's model - discovered that the atom is mostly empty space and the protons are in the nucleus Bohr's model - discovered that the electrons are arranged in different energy levels. Modern model is based on the finding of Thomson, Rutherford, and Bohr.

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