Atom
Smallest particle of an element
Matter
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Subatomic particle
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Nucleus
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Proton
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Neutron
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Electron
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Electron cloud
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Uncharged (neutral) atom
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Atomic number
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Atomic mass
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Subscript
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Coefficient
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Chemical formual
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Element symbol
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Periodic Table of Elements
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Pure Substance
Matter that has definite chemical and physical properties
Element
A pure substance made of one type of atom.
Compound
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Extended Structure
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Molecule
Two or more atoms bonded together.
Chrystal
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