Question

Question 1 (5 points)
When the following atoms make diatomic molecules shown below, which noble-gas configuration is reached?



1. H2 :

2. I2 :

3. N2 :

4. Br2 :

5. O2 :

Instructions: You can write the correct element symbol or English name of noble gas with correct spelling.



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Question 2 (2 points)
What is the true about the bonds shown in the molecule? Multi Select 2







a
The Cl-N bond is polar covalent
b
The N-H bond is non polar
c
The electronegativity difference of the N-H bond is 0.9
d
The Cl-N bond is nonpolar covalent
Question 3 (4 points)
What is the true about the bond shown below between C and Cl? Multi Select.








a
The electronegativity difference is 1.5
b
it is an ionic bond
c
it is a polar covalent bond
d
The electronegativity difference is 0.4
e
The electronegativity difference is 0.5
Question 4 (4 points)
Order the following bonds in increasing (Largest will come last) bond dissociation energy based on the electronegativity difference:





Reorder answers
1.S
Reorder answers
2.U
Reorder answers
3.T
Reorder answers
4.R
Question 5 (4 points)
Order the following bonds in increasing (Largest will come last) bond dissociation energy based on the electronegativity difference and number of electron pairs shared:





Reorder answers
1.U
Reorder answers
2.T
Reorder answers
3.S
Reorder answers
4.R
Question 6 (2 points)
Which of the following has the shortest bond length?



a
S
b
S and U
c
U
d
T
e
S and T
Question 7 (2 points)
Which of the following has the longest bond length? (Hint concider the effect of electronegativity)



a
R
b
T
c
U
d
S
Question 8 (4 points)
Select 4 things that are true about the compound shown below, based on your knowledge of chemical bonds:



a
It is BNH6
b
it is a molecular formula
c
All atoms in the substance has the electron configuration of the noble gas after it
d
This is a Lewis dot structure
e
This is a structural formula
f
It is BN2H6
g
all atoms in this substance have full valence shells
h
All atoms in the substance has the electron configuration of the noble gas before it
Question 9 (6 points)
Which of the folowing is true about the figure below? Select 2



a
Its molecular formula is NH3
b
Its Its molecular formula is N2H3
c
It is an ionic compound
d
All atoms have reached the electron configuration of the noble gas that comes before
e
It is a Lewis dot structure
f
It is a structural formula
Question 10 (4 points)
Which of the following the correct about the compound shown below? Select 2



a
C5H12
b
It is an inorganic compound
c
C6H10
d
It is an unsaturated organic compound
e
It is a saturated organic compound
Question 11 (4 points)
Match the figure below with the correct molecular formula:





Column A
1.
Fig A:
Fig A
2.
Fig B:
Fig B
3.
Fig C:
Fig C
4.
Fig D:
Fig D
Column B
a.C3H4
b.C3H7
c.C3H5
d.C3H8
e.CH4
Question 12 (4 points)
Which of the following molecules have a dipole? ( hint: which ones have unequally destributed polar covalent bonds?) Multi select



a
Fig- D
b
Fig- C
c
Fig- A
d
Fig- B
Question 13 (14 points)
What is the correct name of the covalent compounds given below?

1. BF3 :

2. P2O5:

3. C2H6:

4. CO:

5. SO2:

6. C2H4:

7. NO:

Word Bank:
Carbon tetrahydrideDicarbon tetrahydrideNitrogen monoxideBoron trifluorideDiphosphorus pentaoxideDicarbon hexahydrideDicarbon fiveoxdieNitrogen DioxideSulfur dioxideCarbon monoxideBromine trifluoride
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Question 14 (2 points)
What is the correct prefix for 8?

a
penta -
b
di -
c
hexa -
d
octa -
Question 15 (9 points)
Answer the questions about this covalent compound based on the figure given:





1. What is one region (Shown by boxed numbers) on this substance has a dipole?

2. Which arrow indicates a tripple bond?

3. Arrow indicating a double bond with the lowest bond dissociation energy?

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Question 16 (2 points)
Select all that is true about the properties of covalent compounds.

a
good conductors of electricity
b
poor conductors of electricity
c
Low melting points
d
high melting points

Answer 1

I can answer the questions that don’t require the missing figures/images. For the questions that refer to pictures (S, T, U, R or structural drawings), please upload the images or paste clear text descriptions of the bonds/figures and I’ll finish those.

Answers I can do now:

Question 1
1. H2 : He
2. I2 : Xe
3. N2 : Ne
4. Br2 : Kr
5. O2 : Ne

Question 2 (select 2)
c. The electronegativity difference of the N–H bond is 0.9 — TRUE (≈0.8–0.9)
d. The Cl–N bond is nonpolar covalent — TRUE (EN difference ≈0.1–0.2)
(a and b are false)

Question 3 (multi-select)
c. it is a polar covalent bond — TRUE (C 2.55 vs Cl 3.16 → ΔEN ≈ 0.6)
(all other choices are false)

Question 13 (name the covalent compounds)
1. BF3 : Boron trifluoride
2. P2O5 : Diphosphorus pentaoxide
3. C2H6 : Dicarbon hexahydride
4. CO : Carbon monoxide
5. SO2 : Sulfur dioxide
6. C2H4 : Dicarbon tetrahydride
7. NO : Nitrogen monoxide

Question 14
d. octa -

Question 16 (select all true about covalent compounds)
b. poor conductors of electricity — TRUE
c. Low melting points — TRUE
(a and d are false in general for simple covalent molecular substances)

Missing images needed (please upload/describe) for:
- Questions 4–7 (S, T, U, R bond comparisons and bond lengths)
- Question 8 (compound shown)
- Question 9 (figure below)
- Question 10 (compound shown)
- Question 11 (Figures A–D)
- Question 12 (which figures have dipoles)
- Question 15 (figure with boxed regions and arrows)

Upload those figures or give clear textual descriptions of each labeled bond/figure and I’ll complete the remaining answers.