atom - What is the smallest unit of matter?, nucleus - What is the center of the atom called? , protons & neutrons - What subatomic particles are located in the nucleus? , energy levels - What surrounds the nucleus? , electrons - What subatomic particles are located in the energy levels?, positive (+1) - What is the charge of a proton? , negative (-1) - What is the charge of an electron? , neutral / no charge (n) - What is the charge of a neutron? , atomic number - What does the small number stand for? , atomic mass - What does the larger number stand for? , the number of protons and neutrons  - What does the atomic mass tell you? , the number of protons - What does the atomic number tell you? , the atomic number - How do you find the number of protons in an atom? , atomic mass - atomic number (big number - small number) - How do you find the number of neutrons in an atom? , same as protons - How do you find the number of electrons in an atom? , energy cloud - Energy levels are located in the ___________.,

3. The Structure of Atoms

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