Periodic Trends/Properties – Flashcards
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| Atomic Radii |
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| Half the distance between nuclei of identical atoms bonded together |
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| Radii Trend |
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| As you go across a period, the radii decreases As you go down a group, the radii increases |
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| Ionization Energy |
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| Energy required to remove one electron from a neutral atom |
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| Ionization Energy Trend |
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| As you go across a period, the energy increases As you go down a group, the energy decreases |
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| Electron Affinity |
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| Energy change when an electron is gained |
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| Electron Affinity Trend |
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| As you go across a period, electrons are gained more easily As you go down a group, electrons are harder to gain ---(across = higher neg number, gain = lower neg number)--- |
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| Electronegativity |
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| Measure of an atom in a chemical compound to attract electrons from another atom in a compound |
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| Electronegativity Trend |
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| Across a period, increase Down a group, decrease or remain the same |
