misc
What is a covalent bond?
Bond between two non-metals
What is substitutional versus interstial
Substitutional alloys have atoms very small that fit in exsisting holes between metals, substitutional alloys have atoms with similar radii that replace atoms in the lattice
3 lines or 6 dots between electrons
What is the hybridization for a linear molecular geometry
sp
Which has more lattice energy: NaCl or LiCl
LiCl because of the smaller radius
Why do metalic bonds conduct electricity so well?
Delocalized sea of electrons
What do resonance structures show
That two structure are present simultaniously with delocalized electrons
What is in a double bond (# sigma and pi)
one sigma and one pi bond
What is the molecular geometry and bond angle for NH3
trigonal pyramidal, 109.5
What is the bond length for NO2^-1
1.5 bond length average
Name one property of ionic substances
form crystals, hard melting & boiling points, hard, brittle, conduct electricty when dissolved, good insulators as solid
Alternating anions and cations, close together
What does the sum of formal charges add to
0 or the charge of a polyatomic atom
What is the hybridization for PCl5
sp3d
molecular geometry, bond angle, hybridization
trigonal planar, 120, sp2
decreases
What is the formula for formal charge
What is the most favorable formal charge
0 or as close to 0 as possible
What is the bond angle for a trigonal planar molecule
120
How many resonance structures does CO3^2- have
3
increased bond energy
Where does the partial negative charge go
on the more electronegative element
As number of bonds increase, strength and energy .... and length....
increase, decrease
What is the hybridization and geometry for BrF5
sp3d2, square pyramidal
What is the bond order for NO3^-
1.33