Flashcards
Shapes of molecules and intermoleclar forces
Cards in this deck (22)
- 1What type of bonding forms molecules?Covalent bonds
- 2What are the various shapes of molecules?Linear
V-shaped
Trigonal Planar
Pyramidal
Tetrahedral - 3What shape is a water molecule?V-shaped
- 4Degrees between atoms in linear molecules180 degrees
- 5Degrees between atoms in a v-shaped molecule104.5 degrees
- 6Degrees between atoms in a trigonal planar molecule120 degrees
- 7Degrees between molecules in a pyramidal molecule107 degrees
- 8Degrees between atoms in a tetrahedral molecule109.5 degrees
- 9forces within an atomintramolecular forces
- 10forces between moleculesintermolecular forces
- 11intermolecular forcesvan der waals
dipole-dipole interactions
hydrogen bonding - 12sequence of strength of repulsion abilitylone pair:lone pair > lone pair:bonding pair > bonding pair:bonding pair
- 13a polar molecule mustbe polar covalent
not be symmetrical - 14how can polar molecules be non-polar overall?high degree of symmetry with a geometric centre
- 15are intermolecular forces stronger or weaker than covalent bondsweaker
- 16what effect do intermolecular forces have on boiling pointthe stronger the intermolecular forces, the higher the boiling point
- 17van der waals forcesweak attractive forces caused by the movement of electrons within a molecule
- 18how do temporary dipoles form?Electrons move randomly within a bond so that at a particular point in time they may be nearer to one atom than the other which create temporary polarity.
- 19permanent dipoles are formed betweenpolar molecules where the positive end of one molecule is attracted to the positive end of another.
- 20are permanent dipoles stronger or weaker than van der waals forcesstronger
- 21hydrogen bondinga special type of dipole-dipole interaction, which occurs when hydrogen id bonded to small electronegative atoms such as O, N or F
- 22Van der Waals forces are named afterJohannes Van der Waals
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- Leaving Certificate Chemistry (Shapes of molecules and intermolecular forces) Flashcards on Shapes of molecules and intermoleclar forces, created by eimearkelly3 on 11/08/2013.
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