Electron - A subatomic particle with a negative charge, is located outside the nucleus and has a mass of 0., Proton - A subatomic particle with a positive charge, is located in the nucleus, and has a mass of 1., Neutron - A subatomic particle with no charge, is located in the nucleus, and has a mass of 1., Nucleus - The center of the atom that holds protons and neutrons., Electron Cloud - The space outside of the nucleus where electrons exist., Carbon - I have an atomic number of 6., Helium - I have an atomic number of 2., Calcium - I have 20 protons., Iron - I have 26 protons., Neon - I have 10 electrons.,

Subatomic Particles and Atomic Number

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