Week 7 Interactions and Solids Flashcards
what are the 5 common interatomic/intermolecular interactions
Van der Waals Ionic Covalent Metallic Hydrogen bonds
what does the LJ (lennard-jones) potential do
describes the potential energy of interactions between two non-bonding atoms based on the distance of their separation
what is the LJ potential eqn
Vlj = 4ε0 [(σ/r)^12 - (σ/r)^6]
define ionic bonding
transfer of electrons between metals and non-metals to form ions
why are ionic bonds usually very strong
there are permanent dipoles
define covalent bonding
sharing of electrons between non-metals to become stable
define metallic bonding
sharing of free/delocalised electrons between metallic ions/atoms
define hydrogen bonding
special bond between hydrogen and a select few other elements
what is electronegativity
measurement of the tendency of an atom to attract a shared pair electrons with another atom
what is a crystalline solid
structured unit of one or atoms arranged in a lattice
what are the basis for a monoatomic and diatomic solid in 1D eqns
R = nd monoatomic
R = 2d(n+d) and R = 2dn diatomic
d is the interatomic distance
what are the basis for a monoatomic and diatomic solid in 2D eqns
R = a1n + a2n monoatomic R = a1n+ a2m diatomic
what is the basis for a monoatomic solid in 3D eqn
R = a1l + a2n + a3m
what is the bragg diffraction eqn
nλ = 2dsinθ
