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16 Cards in this Set
- Front
- Back
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Atomic Number |
Number of protons and electrons |
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Neutrons |
Subatomic particles, no electric charge. Neutrons= atomic mass-electrons |
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Protons |
Subatomic particles with a positive electric charge. |
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Electrons |
Subatomic particles with a negative charge. |
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Average atomic mass |
Average mass of the mixture of isotopes of an element that is usually found in nature. |
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Isotope |
Atom of an element with different atomic masses. Have the same # of electrons, same # of protons but different # of neutrons. Most elements have 2 naturally occurring isotopes. |
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Calculating Average Atomic Mass (Formula) |
Formula=(mass•%abundance1)+(mass•%abundance2) |
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Periodic Trends |
Trends on the periodic table |
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Atomic Radius/Atomic Size |
Estimate of the size of an atom from its nucleus to its outer perimeter. |
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Ion |
Atom that has gained or lost one or more electrons. |
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Ionization Energy |
Energy needed to remove an electron from a gaseous atom. |
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Electron Affinity |
Energy released when an electron is added to a gaseous atom. |
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Anion |
Negative Ion |
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Cation |
Positive Ion |
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Electronegativity |
Property that determines how strongly the electrons in a chemical compound are held by any one atom. |
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Screening Effect |
Reduction in attractive force between nucleus and outer electrons resulting from the presence of the inner electrons. |
