Flashcards
CHEM 201—Lewis Structures
Cards in this deck (28)
- 1Binary BondingWhere there are two element types involved
- 2ElectronegativityMeasure of the extent to which an atom pulls its bonding electrons towards itself
- 3Strong AcidRemember it dissociates 100% into H3O+ when reacted
- 4Ionic CompoundA network of many ions. Not an individual molecule
- 5Covalent CompoundNot an individual molecule
- 6Guidelines for Lewis Structures1. Sum up the valence electrons
2. Decide on the molecule skeleton
3. Assemble skeleton using single bonds
4. Distribute the remaining electrons in pairs to most EN atoms
5. Use formal charge - 7Formal ChargeWhere we pretend each bond is totally covalent and subtract the numbers of bonds and lone pairs an atom has by its valence electrons. We always want to MINIMIZE formal charge
- 8Bond OrderGoing from single to triple bonds, the overall bond order increases
- 9Bond StrengthGoing from single to triple bonds, the overall bond strength increases
- 10Bond LengthGoing from single to triple bonds, the overall bond length decreases
- 11ResonanceWhen the structures are different if two of the same atoms are named or called different, but these structures are equivalent despite those differences
- 12Hybrid StructuresThe representation of resonance structure as a snapshot in real time.
- 13Full StructuresInclude all the carbon-hydrogen bonds and are not simplified
- 14Condensed StructuresInclude that main carbon molecules and their bonds in a simplified way. Types of bonds are not specified
- 15Line DiagramsThe simplified structures of compounds that assume carbons and hydrogens are at the points of the bonds unless otherwise specified, and are in a zig zag formation to promote 3D thinking
- 16Carbon PrefixesMeth, eth, prop, but, pent, hex, hept, oct, non, dec
- 17LocantAnother word for number
- 18Alkane SuffixAne
- 19Alkene SuffixEne
- 20Alkyne SuffixYne
- 21Aldehyde SuffixAl
- 22Ketone SuffixO(h)ne
- 23Carboxylic Acid SuffixOic_acid
- 24Ester SuffixOate
- 25Overall PolarityMay have individual dipoles. Is either polar or non-polar
- 26Individual DipolesMay not be the same as the overall polarity. Can cancel if they are in different directions or contribute to the polarity
- 27Polar Covalent BondsOnly if the difference between the two EN of the elements is greater than 0.4
- 28Ionic BondsOnly if the difference between the two EN of the elements is greater than 1.8
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- Ionic and covalent bonding, resonance, formal charge, etc. Chapter 7 of the textbook
- Created by
- Natasha Gidluck
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