Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
Name : ___________________________
Knowledge and Skills
Mark
Equivalent Grade
Knowledge and Understanding
/ 35
Thinking and Investigation
/ 35
Communication
/ 15
Application
/ 15
Total Grade
/ 100
 Read through the entire test before beginning. There are 10 pages in total,
including the Periodic Table and the electron orbitals chart provided at the
end of the test.
 Answer the questions in the spaces provided. If needed, you can use the
back of the page, but let me know.
 I wish you all a successful test!
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
Knowledge and Understanding (35%)
1.
Multiple Choice Questions
a. Which of these elements is the most
electronegative?
i. Germanium
ii. Indium
iii. Oxygen
iv. Phosphorous
b. Nonmetals have
i. Small numbers of electrons in the valence shell and form positive
ions.
ii. Large numbers of electrons in the valence shell and form negative
ions.
iii. Large numbers of electrons in the valence shell and do not form ions.
iv. Large numbers of electrons in the valence shell and form positive
ions.
c. The ionization energy of an element
i. is the energy needed to move an electron from the first energy level
to the second one
ii. is the energy generated by its nucleus
iii. cannot be calculated or observed
iv. is the energy needed to detach an electron from an elemental atom
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
Multiple Choice Questions (continued)
d. The Pauli exclusion principle states that
i. any atoms with a free s orbital can form bonds
ii. no two atoms can occupy the same orbital unless their spins are
different
iii. two atoms sharing an orbital are matched exactly
iv. atoms of the same configuration do not change
e. What is the correct order of the atomic radius in the elements below?
i. Cl > Al > Mg
ii. Mg > Al > Cl
iii. Al < Mg < Cl
iv. Mg < Al < Cl
v. Mg < Al > Cl
2.
For the following subshells give the values of the quantum numbers (n, l and
ml) and the number of orbitals in each subshell:
a. 4p
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b. 3d
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c. 3s
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d. 5f
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e. 2p
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
3.
Write the ground-state electron configuration for the following elements:
a. Lithium:
________________________________
b. Copper:
________________________________
c. Bromine:
________________________________
d. Phosphorus: ________________________________
e. Vanadium:
4.
________________________________
Explain, in terms of electron configuration, why the decrease in atomic radius
from Ca to Ga is greater than that from Mg to Al.
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
5.
Classify the following bonds as ionic, polar covalent or non-polar covalent and
draw the corresponding Lewis Diagram:
6.
a. HCl
_______________________________________
b. KF
_______________________________________
c. the CC bond in H3CCH3
_______________________________________
d. O2
_______________________________________
e. MgBr2
_______________________________________
Use the VSEPR model to predict the geometry of the following molecules and
ions:
a. AsH3
_______________________________________
b. OF2
_______________________________________
c. AlCl4-
_______________________________________
d. BrF5
_______________________________________
e. BF3
_______________________________________
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
Thinking and Investigation (35%)
7.
Imagine that scientists have discovered a new element X, whose atomic
number is 120. Write the new element’s electron configuration (full) and
indicate its n and l values for the outermost electron.
________________________________________________________________
_________________________________________________________________
8.
+
Why is the ionization energy required to remove an outer electron from Na so
much greater than that needed to remove the outer electron from Na? (HINT: if
you’re stuck, draw the orbitals of Na and Na+ to help you visualize).
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
9.
Determine which is most polar and explain your reason for making this choice:
nitrogen trifluoride
OR
phosphorus trifluoride.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
10.
In which liquid, HF(l) or H2O(l), will the hydrogen bonds be strongest? Based on
this prediction, which of the two liquids will have the highest boiling point?
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Application (15%)
Answer one of the two following questions.
11.
How do you think astronomers utilise the fact that every element has its own
distinctive electron configuration?
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
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_________________________________________________________________
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
12.
Frozen water is less dense than liquid water. What would be the effect on
Canadian lifestyle if it were not so?
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_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
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_________________________________________________________________
_________________________________________________________________
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
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Chemistry Grade 12, SCH 4U: Structure and Properties of Matter
Test (Summative Evaluation)
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