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10 Cards in this Set
- Front
- Back
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Dalton's Atomic Theory |
1808 |
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Elements are composed of extremely small particles called _____ |
Atoms |
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Composed of atoms of more than one element |
Compounds |
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Involve the rearrangement of atoms |
Chemical reactions |
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Not created or destroyed in chemical reactions |
Atoms |
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Number of protons in nucleus |
Atomic Number |
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Z |
Atomic Number |
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=Number of protons + number of neutrons = Atomic number + number of neutrons |
Mass Number |
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Mass Number |
A |
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Are atoms of the same element (X) with different numbers of neutrons in their nuclei |
Isotopes |
