These questions have been provided on a CC-BY basis to facilitate peer instruction.

1. Trends in the Periodic Table

2. Why share questions?
• There are many excellent open
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internet.
• These include many videos of
more-or-less traditional university
lecturing.
• These questions have been
provided on a CC-BY basis to
facilitate peer instruction.

3. How many quantum numbers are required
to define the highest energy occupied
orbitals in phosphorus atoms?
A. 1
B. 2
C. 3
D. 4
1
2
3
4
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4. How do we know the ionic radii of O2− is
1.40 Å?
A. Distance measurements
of compounds with
oxygen and a more
electronegative element
B. Halving the O2 bond
length
C. Distance measurements
of lattices with oxygen
and a more
electropositive element
D. From the atomic radius
of isoelectric Ne.
A. B. C. D.
0% 0%0%0%

5. What do the ions O2-, F- Na+ and Mg2+
have in common with atomic Neon (Ne)?
A. Pretty Colours?
B. Similar radii?
C. High solubility in
water?
D. They have the same
number of electrons?
Pretty
Colours?
Sim
ilarradii?
High
solubilityin
w
ater?
They
have
the
sam
e
num
ber...
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6. Which of these is the correct order for the
ionic radii of the halide ions?
A. I- > F- > Br- > Cl-
B. I- < Br- < Cl- < F-
C. Li+ < Na+ < K+ < Rb+ <
Cs+
D. F- < Cl- < Br- < I-
I->
F->
Br->
Cl-
I-<
Br-<Cl-<
F-
Li+
<
Na+
<
K+
<
Rb+
<
Cs+
F-<
Cl-<
Br-<
I-
0% 0%0%0%

7. Which of the following pairs of elements
are closest in atomic radii?
A. Carbon and
Phosphorus
B. Nitrogen and Silicon
C. Bromine and Barium
D. Carbon and Silicon
Carbon
and
PhosphorusNitrogen
and
SiliconBrom
ine
and
Barium
Carbon
and
Silicon
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