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Atoms

An atom is the smallest unit of ordinary matter that forms a chemical element

TermDefinition
Proton A proton is a subatomic particle with a positive electric charge and a mass slightly less than a neutron.
Electron The electron is a subatomic particle whose electric charge is negative one.
Neutron The neutron is a subatomic particle which has a neutral charge and a mass slightly bigger than a proton.
Subatomic smaller than or occurring within an atom.
Mass number Is the number of protons and the number of neutrons.
Atomic number The atomic number of an atom is the number of protons in the nucleus of an atom.
Nucleus The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
Created by: Shan Kenny
 

 



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