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

Subatomic Particles

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