Chem Exam 3
Terms
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- Chemical Bonds
- Strong forces of attraction that hold together atoms in a molecule
- Cation
- A positively charged ion that is attracted to a cathode
- Anion
- A negatively charged ion that is attached to a anode
- Metal + Non-metal
- Anions, Cations, Ionic Bonding
- Non-metal+Non-metal
- No ions involved, Covalent, Bonding
- G.N.Lewis
- All chemical bonding results from a redistrubution of valence electrons
- Valence electrons
- electrons found in the outer most shell of an atom
- Valence
- the number of electrons an atom must gain or lose to achieve maximum stability
- Covalent Bonding
- occurs from interactions of Non-metals+Non-metals
- Covalent Bond
- A shared pair of electrons that complete the outer shell of two atoms simultaneously
- Coordinate Covalent Bond
- A shared pair of electrons donated to the central pool by the same atom.
- Linus Pauling
- founded Electronegativity
- Electronegativity
- the attraction of an atom for the pair of electrons that make up a covalent bond.
- Linus Pauling's 3 Rules for Electronegativity Bonds formed between two atoms
- 1. If ENx-ENy = 0, then bond=non-polar covalent bond 2. If 1.7 > ENx-ENy > 0 , bond = polar covalent bond 3. If ENx-ENy ≥ 1.7, bond = Ionic bond
- ENx-ENy = 0
- non-polar covalent bond
- 1.7 > ENx-ENy > 0
- polar covalent bond
- ENx-ENy ≥ 1.7
- Ionic bond
- Non-polar covalent bond
- A bond between two atoms who's electronegativity difference is 0