things from study guide Flashcards
the central atom should have the
lowest electronegativity
the atom with the most electronegativity should have
the more negative formal charges
formal charge
valance-dots-lines
will atom connectivity change in resonance structures?
no, connectivity never changes
the resonance hybrid structures of a model is an average of
the different contributing resonance structures
resonance hybrid structures contain
delocalized electrons
triple bonds are
the shortest and strongest
single bonds are
the longest and weakest
an increase in bond order results in a decrease in … and an increase in…
decrease=bond length
increase= bond strength
bond formation is … because energy is ….
exothermic b/c energy is released
bond breakage is … because energy is …
endothermic b/c energy is needed to break bonds
an exothermic reaction should have
weak reactants and forms strong bonds
an endothermic reaction should have
strong reactants and produces weak bonds
hybrid orbitals are
an average of the shapes and energy levels that form them
a sigma bond is … than a pi bond
stronger
antibonding is a result of
destructive interference
bond order higher than one indicates
a stable bond
placing electrons in a bonding orbital can
help stabilize an ion or molecule
antibonding orbitals have more… than given atomic orbitals
higher energy
the total number of atomic orbitals that combine to form molecular orbitals match the
total number of molecular orbitals produces
adding an electron to an antibonding orbital
decreases stability
when two sigma orbitals combine with heads having the same charges it is
bonding
when two sigma bonds combine with two different charged heads
antibonding
who has s-p mixing
B, C, N
