subatomic particles - particles smaller than and inside the atom, proton - positively charged particle inside the nucleus, neutron - particle inside the nucleus without a charge, electron - negatively charged particle located on the orbits around the nucleus, nucleus - makes up 98% of the mass of the atom, positively charged, atomic number - tells you the number of protons in an element's atom, atomic mass - this number is the total protons and neutrons,

Atomic Structure

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