1.2 - Structure And Bonding Flashcards
What is the common name for intermolecular forces of attraction
Van der Waals’
3 types of van der waals
LDF
Permanent dipole to permanent dipole
Hydrogen bonding
4 types of intramolecular forces of attraction
Metallic bonding
Ionic bonding
Covalent network
Covalent molecular
What is metallic bonding
Metallic bonding is the strong electrostatic force of attraction between positive nuclei and delocalised electrons
Forms lattice
What is ionic bonding
Ionic bonding is the electrostatic force of attraction between a positive and negative ion
Occurs between atoms with a large difference in electronegativity values
Forms lattice
Covalent bonds
Common attraction for a shared pair of electrons
Covalent network
Covalent networks form a large 3D structure
Examples include: boron, carbon (carbon and graphite) and silicon
Covalent molecular
Covalent molecular forms discrete molecules
Examples include: S8, P4, C40 and C60
What is pure covalent bonding
When both atoms have the same EV and electrons are shared equally
What is polar covalent bonds
When the atoms have a small difference in EV and electrons are pulled closer to the atom with higher EV
What is LDF
When electrons are distributed unevenly and there becomes temporary dipoles
What is permanent dipole - pd attractions
If a molecule is asymmetrical and has polar bonds then it will form a permanent dipole
What is hydrogen bonding
Bonds between hydrogen and F,O or N
What type of solvent will dissolve polar molecules
Polar solvents
What type of solvent will dissolve non polar molecules
Non polar solvents
