Atomic Structure Key Terms
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| Nucleus | The center of an atom, made up of protons and neutrons
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| Proton | A positively charged subatomic particle in the nucleus of an atom
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| Neutron | A neutral subatomic particle in the nucleus of an atom.
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| Electron | A tiny negatively charged subatomic particle moving around outside the nucleus of an atom.
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| Energy Level | Any of the possible energies an electron may have in an atom.
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| Orbital | A region in an atom where there is a high probability of finding electrons.
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| Valence Electron | An electron in the outermost energy level of an atom.
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| Cation | An ion with a positive charge.
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| Anion | An ion with a negative charge.
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| Group ( family) | A vertical column of elements in the periodic table.
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