G 10
Chemistry worksheet(11)
sec 5.2
Bonding of Atoms
I- Multiple Choices
1.
A molecule that forms when atoms of the same element bond together is
called:
A.
B.
C.
D.
Allotrope
Diatomic element
Molecular element
Molecular substance
2. Which of the following pairs of compounds are allotropes?
A. sulfuric acid and nitric acid
B. ozone and CO2
C. Cl2 and Cl
D. O2 and O3
3. _____ is an allotrope of carbon.
A. Diamond
B. Carbon monoxide
C. Ozone
D. Black phosphorus
4. A substance that has atoms held together by covalent bonds rather than ionic
bonds is known as:
A.
B.
C.
D.
Ionic compound
Molecular substance
Covalent compound
Polar covalent compound
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5. Hydrocarbons are most commonly used as_________________
A.
B.
C.
D.
Acids
Bases
Fuels
Explosives
6. Which statement is NOT true about allotropes?
A. Allotropes contain only one element.
B. Allotropes have different oxidation numbers
C. The properties of allotropes are different
D. Allotropes have different molecular structures
7. The correct name of the molecular compound N2O5 is:
A. Dinitrogen heptaoxide
B. Dinitrogen pentoxide
C. Dinitrogen dioxide
D. Dinitrogen oxide
Part Two: Answer the following
I.
Write the formulas for the following molecular compounds:
a) Nitrogen trifluoride________NF3____________
b) Sulfur tetrabromide _______SBr4__________
c) Tetraphosphorus trisulfide ________P4S3_________
d) chlorine monofluoride_________ClF______________
e) Propane______________C3H8____________
II.
Name the following molecular compounds( 4 Mark each)
a) S2Cl2______________dinitrogen dichloride_________________
b) CS2____________Carbon disulfide_____________________
c) SO3_____________Sulfur trioxide____________________
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d)
P4O10___________tetraphosphorus decoxide _____________________
e)
C5H12_______________pentane_________________
III.
Complete the following table
Property
State at room
temperature
Melting point
Ionic Compound
Crystalline Solid
Covalent Compound
Solid, liquid, gas
High
Low
Yes
No
High
Low
Conductivity when
dissolved in water
Water solubility
Part Three: Long answers
1. Define a molecular element and give examples
A molecule that forms when atoms of the same element bond together
2. Define a hydrocarbon. Give two examples
An organic compound contains only carbon and hydrogen elements.
3. Explain what allotropes are and give two examples that containing C and O
elements.
Molecules of single element that differ in crystalline or molecular structure
are called allotropes.
Carbon allotropes are diamond, charcoal, graphite
Oxygen allotropes are oxygen gas O2 and Ozone O3
4. What is the difference between organic and inorganic compounds
Organic compounds contain carbon elements but inorganic compounds do
not contain carbon elements
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5. A tank of a substance delivered to a factory is labeled C4H10. What is the name of
the substance in the tank? Butane
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