Atom - the smallest part of an element, Nucleus - found in the center of an atom , Element - made up of one type of atom only, Proton - positive charged , Electron - negative charge , Neutron - neutral, the lightest subatomic partical - is the electron , Shell - the path the election takes going around the nucleus , Atomic number - the number of protons and in an atom, Atomic mass number -atomic - the total number of protans and neutrons in an atom, Isotopes - Atoms with the same atomic number but have a different mass number, Stable atoms - the number of positive protons and number of negative charge electrons are the same, Atomic mass number - tells the number of neutrons,

The Atom

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