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Exam-CHEM3503-2002December.pdf
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EXAMINATION
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December
112002
CHEM.3503; InorganicChemistryI
Fial Examination
50o/"
Question
Mark
I
Describe
the pattern
of atomicproperties
obsen'ed
when elements
are put in order of
increasing
atomic
weight.
Erplainhow thispattern
wasreconstructed
into thelongform
of the periodic
table
2
1
Whattwo kev exoeriments
showed
that atoms
were
divisible
?
J
Define
therange
of values
and
the structural
aspects
of orbitals
are
identified
by quantum
numbers
n, I andm'.
2
4
Explain
why both quantum
numbers
n andI mustbe used
to define
the complete
setof
Slater's
Rules
of shieldinc
for valence
electrons
l
5
Use
the lonization
Potential
and
the Electron
AlTinity
of an isolated
atom to give the
Atomic Orbital
definitron
of its Electroneqativity
andHardness.
1
6
Givethe formula
for calculating
the
lattice
energy,
U, of an
ionic salt.
Define
each
term
in the formula.
I
7
Draw a solvated
ion andidentify
whichcomponents
arethe Lewis acidandLewisbase.
I
8
Describe
how the change
in (M-O) bondstrength
from a 1A to a 2A hydrated
ion affects
the strength
of the internal
(O-H) bond
in the coordinated
water
molecule
1
q
Describe
how this chanee
in bondine
leads
to hydrolvsis
of the water
molecules
bound
to the
2A ions.
t0
Useshielding
to erplain
why Boroncan
form molecular
compounds
but Aluminum
forms
ionicsalts.
l1
Draw the structure
of diborane
and
showthe two types
of covalent
B-H bonding.
2
t2
Predict
the reactions
resulting
from trying
to dissolve
N,(SO.,)).
in water
at pH 7
l-
IJ
Use the difference
in electronegativity
between
Li and C to explain
why the bond in
LiCH. is polar
covalent
andnot
ionic.
l4
Draw the shapes
of the bonding
and antibonding
p orbitals
of tr.vo
atoms,
showing
all
phases
andthe overlaps
for sigma
andpi bonding
andatibonding
interactions
2
15 Using
the Highest
atoms,
A and B,
diatomic
molecule
Occupied
and
Lowest
Unoccupied
Atomic Orbitals
of two different
draw the energylevel diagramof a singly-bonded
heteronuciear
Identify
bonding
andantibonding
molecular
orbitals.
2
I6 Use
theenergy
gaps
on thisenergy
level
diagram
to givethe
Molecular
Orbital definition
of the Electroneeativitv
and Hardness
values
of the bonded
atoms.
I
t7
State
the Hardness
criterion
of Bond Strength.
On the energy
level
diagram
of question
I 5, shor.l'the
orbitalenergies
whichdefine
thedifference
in Hardness
between
the atoms
I
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