As Chemistry Unit 1 Bonding
Quick overview of intermolecular and intramolecular forces needed in unit 1 as chemistry
- Created by: Sarah
- Created on: 09-12-12 16:22
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- Bonding
- Intermolecular
- Hydrogen Bonding
- An intermolecular force between the lone pair on an electronegative atom (N, O or F) and a hydrogen atom bonded to such an electronegative atom
- Strongest intermolecular force
- E.g. H20 or HF
- Forces that holds proteins in helix shape
- Van Der Waals
- Weakest of the intermolecular forces
- Temporary dipole-induced dipole attraction
- Permanent-Permanent dipole
- Molecules with permanent dipoles attract each other, e.g. HCl
- Hydrogen Bonding
- Intramolecular
- Covalent
- A shared pair of electrons between two atoms
- Coordinate bonding
- When both electrons in a shared electron pair originate from one atom (from a lone pair on th donor atom)
- Polar covalent
- When a covalent bond exists between atoms of differing electronegativity
- Ionic
- Electrostatic force of attraction between two oppositely charged ions
- Conduct electricity when molten or in solution as ions are free to carry charge
- Metallic
- Electrostatic force between metal ions and delocalised electrons
- High melting and boiling points - lots of energy needed to remove ion from delocalised electrons
- Covalent
- Intermolecular
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