covalent bonding
- Created by: Margaret Hobart
- Created on: 30-04-21 17:35
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- covalent bonding
- covalent bonds
- shared pair of e-
- between two non-metals
- coordinate (dative) bonds
- bond contains a shared pair of e- both supplied by the same atom
- bond polarity
- electronegativity
- the ability of an atom to attract e- in a covalent bond
- electronegativity
- macromolecular (giant covalent)
- graphite
- C atoms arranged in sheets of flat hexagons covalently bonded with 3 bonds each.
- 4th C atom is delocalised
- e- can move through layers and so can conduct electricity
- weak bonds between layers
- layers can slide over each other
- strong bonds
- high melting point
- diamond
- each C atom is bonded to 4 other C atoms in a tetrahedra shape
- strong covalent bonds
- high melting point
- really hard
- vibrations travel through lattice and os can conduct heat
- no delocalised e- so no electricity conduction
- graphite
- molecular
- small molecules held together by weak intermolecular forces
- when it changes state the covalent bonds aren't broken - the intermolecular force are
- atoms held together by strong covalent bonds
- low melting point
- doesn't conduct electricity
- when it changes state the covalent bonds aren't broken - the intermolecular force are
- atoms held together by strong covalent bonds
- e.g.iodine
- small molecules held together by weak intermolecular forces
- covalent bonds
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