Name: _______________________________
Section: A
Unit: 5
Topic: Periodicity and Structure and Bonding
1. Why do atoms of elements bond with each other?
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2. Two types of chemical bonding are ionic bonding and covalent bonding. Outline what happens
during:
Ionic bonding: _____________________________________________________________________
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Covalent bonding: __________________________________________________________________
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3. What electrons are involved in bonding?
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4. What are the three ways that atoms can bond with each other to achieve noble gas
configuration?
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5. What are the three types of chemical bonding?
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6. Using your periodic table to help you, write the formula of each of the following binary
compounds:
a. Sodium Oxide: ________________________________________________________________
b. Copper (II) Bromide: ____________________________________________________________
c. Tetrachloromethane, a compound formed between carbon and chlorine:__________________
d. Aluminium Sulphide: ___________________________________________________________
e. Ammonia, a compound formed between nitrogen and hydrogen: ________________________
7. Define valency?
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8. What determines the valency of an atom?
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9. What is the valence number of the following elements?
Calcium:
Phosphorus:
Fluorine:
Nitrogen:
Lithium:
Aluminium:
Magnesium:
Boron:
Silicon:
Copper (III):
Iron (II):
Chromium (II):
10 . Write the name for negatively charged ions and positively charged ions respectively.
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11. In group II, state which element between calcium and magnesium is the most reactive and state
why and give one (1) example of evidence to support your answer?
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12. In group VII, state which element between chlorine and iodine is the most reactive and state
why and give one (1) example of evidence to support your answer?
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13. For the following reaction, place the words (YES) or (NO) to indicate if a displacement reaction
will take place. If a reaction does take place state the color you will see at the end of the
reaction?
a. Bromine and Potassium Chloride: __________________________________________________
b. Chlorine and Potassium bromide: __________________________________________________
c. Bromine and Potassium Iodide: ____________________________________________________
d. Iodine and Potassium Chloride: ____________________________________________________
14 . Chlorine and magnesium are both elements which are found in Period 3 of the periodic table.
One is metal and one is a non-metal.
a. Which one is the metal? Give THREE reasons for your answer.
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b. Which one is the non-metal? Give THREE reasons for your answer.
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15. How does metallic nature and non-metallic nature of elements in Period 3 change from left to
right?
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16. Which is more reactive, sodium or magnesium? Give a reason for your answer.
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16. Which is more reactive, sulfur or chlorine? Give a reason for your answer.
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