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10 Cards in this Set
- Front
- Back
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Density |
amount of mass in a unit volume of a substance. Density is dependent on temperature because it changes whether hot or cold. |
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Cathode Rays |
Radiation produced between electrodes that originated at the negative electrode and traveled to the positive electrode. |
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Nucleus |
Small dense region in the center of the atom that is positively charged and contains most of the mass of the atom. Made up of protons and electrons. |
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Isotopes |
Atoms with the same atomic number but different mass numbers. ex. carbon-12, carbon-14 |
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Chemical Formula |
Notation that uses symbols with numerical subscripts to convey the relative proportions of atoms of different elements in a substance. ex. O2, O3 |
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Empirical Formula |
Chemical formula that only gives the relative number of atoms. Subscript are always the smallest possible. ex. H2o2 = HO |
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Ion |
Charged particle when electrons are gained or lost |
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Cation |
Ion with a positive charge |
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Anion |
Ion with a negative charge |
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Polyatomic Ion |
atoms joined as in a molecule nut have a net positive or negative charge |
