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28 Cards in this Set
- Front
- Back
Atom |
Smallest Identifiable unit of an element |
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electron |
Fundamental particle with a negative charge. Mass = 0.00055 AMU |
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Nucleus |
Houses most of an atoms mass, and 100% of its positive charge |
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Protons |
Positively chatged, mass = 1.0073 amu |
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Neutron |
Neutral charge. Mass = 1.0087 AMU |
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Group |
Vertical Column on the Periodic Table |
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Period |
Horizontal row on the periodic table |
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Atomic Number |
Defined by the number of protons in an atoms nucleus |
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Chemical Symbol |
One or two letter abreviation for the element on the periodic table. |
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Metals |
Occupy the left side of the period table. Have similar properities - Conductors -Malleable -Ductile |
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Non-Metals |
Occupy the right side of the periodic table. More variable in their properties |
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Metalloids |
Occupy the space between Metals and non-metals on the periodic table (The zig Zag). Mixed properites of non-metals and metals. Most are semiconductors |
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Main Group Elements |
Predictable properties based on their locations on the periodic table. |
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Transition metals |
Properties are less predictable based on locations |
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Group 1A |
Alkali Metals |
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Group 2A |
Alakaline Earth Metals |
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Group 7A |
Halogens |
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Group 8A |
Noble-Gases |
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Ions |
Atoms that lost or gained an electron |
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Ion Charge |
# of protons - # of electrons |
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Cation |
Positively charged Ion |
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Anion |
Negatively charged Ion |
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Isotopes |
Atoms with the same number of protons but different # of nuetrons |
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Percent Natural Abundance |
Ratio of Isotopes in a naturally occuring sample of an element. |
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Mass Number (A) |
Sum of Neutrons and Protons in an Atom |
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Atomic Mass |
= to the average mass of the naturally occuring ratios of isotopes |
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Radioactive Particles and their properties |
Alpha - Stopped by paper, Skin Beta - Passes serveral mm through skin Gamma - passes through body, several feet of concrete |
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Radioactive Isotopes |
Decay and release radioactive particles. (Nuclear Radiation) |