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10 Cards in this Set
- Front
- Back
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elements
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the basic materials that make up all substances and that are made out of atoms, which are made of subatomic particles
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atom
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the smallest piece of an element that is still that element
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nucleas
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the center of the atom
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protons
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the positively charged subatomic particles in the nucleas
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neutrons
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the neutral subatomic particles in the nucleas
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electrons
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the negatively charged subatomic particles that orbit around the nucleas
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atomic number
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the unique number that identifies an element
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periodic table
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the table listing all known elements
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AMU
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atomic mass unit, used to measure at atomic sizes
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valence electrons
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electrons on the outermost edge of the atom that determine the element's reactivity
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