chemical bonding Flashcards
what types of bonds do diatomic elements make?
pure covalent/ non-polar-covalent
what type of model in metallic bonding?
sea of electrons (free electron model)
conductivity, thermal conductivity and hardness…
increase moving across a period
structure of ionic bond
lattice (crystal)
EN for ionic bonds
Delta EN > 1.7
are ionic bonds brittle or soft?
brittle
define intramolecular forces
forces within molecule/element interaction
Define intermolecular forces
forces between molecules
do covalent bonds conduct electricity?
no with the exception of acids and bases
EN for polar
EN = 0.5 - 1.7
EN for non-polar
EN < 0.5
when does the central atom have more than 8 valence electrons?
PCl5 and XeF4-
when does the central atom have less than 8 valence electrons?
BH3-
when does a molecule contain an odd number of non-bonding electrons?
NO
what is a cordinate covalent bond?
when both electrons in the bond are donated by the same atom
what are the 4 intramolecular forces?
- London dispersion
- dipole-dipole
- hydrogen bond
- electrostatic forces
what bonds have London dispersion forces?
diatomic or non-polar covalent
what bonds have dipole-dipole forces?
polar covalent bonds with partial charge change
what elements create hydrogen bond forces when combined with hydrogen?
oxygen, nitrogen or fluorine
what type of force is hydrogen bonds?
special dipole-dipole
what bonds have electrostatic forces?
ionic bonds
how do you find the bond type?
change in electronegativity
how do you find the type of intramolecular forces?
looking at the type of bond
non polar or polar molecule: linear diatomic?
non-polar
