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10 Cards in this Set
- Front
- Back
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shapes of molecules with 2,3 and 4 electron domains. |
2 electron domains, linear 3 electron domains: trigonal planer 4 electron domains: tetrahedral irregular shapes: v-shaped/bent |
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what is a electron domain: |
a domain of electrons being bonded, double, triple and dipole bond counts as 1 electron domain. |
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how does non bonding pairs/ lone pairs affect electron domains. |
counts as a electron domain but takes up more space, giving new shapes with difference of roughly 2.5* difference between domains. |
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what are the bond angles of domains. |
4 bonding domains: 109.5 3 bonding domains: 107.3 2 bonding domains: 104.5 |
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what are the giant covalent structures |
Diamond, graphite, graphene, C60 buckminsterfullerene & silicon dioxide (SiO2) |
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what are the different bonds? |
covalent, ionic and metallic |
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what is a dative bond |
one atom giving a atom with less then neccesary electrons to enable a bond between them. both electrons come from the same atom. |
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what is the difference between ionic and covalent bond? |
ionic: two ions give/take electrons from each other and then attract covalent: two atoms share electrons |
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what is polarity? |
shared electrons are unevenly shared creating a polarity marked as delta+ and delta - to show a polar bond. |
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what is the rule of 1.8? |
take the electronegativity of both elements in a bond and if its < 1.8 its covalent and if it's > 1.8 its ionic. ex: MgCl2 = 3.0 - 1.2 = 1.8 / ionic ex: BeCl2 = 3.0 - 1.5 = 1.5 / covalent |
