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a. Which elements are chemically similar to each other?
Bromine
Phosphorus
Calcium
Boron
Nickel
Iodine
Fluorine
b. Which elements are chemically similar to each other?
Oxygen
Iron
Sulfur
Aluminum
Iodine
Carbon
c. Which elements are chemically similar to each other?
Lithium
Oxygen
Lead
Manganese
Potassium
Silicon
Solution
a) Bromine and iodine are chemically similar. Both comes in group 7A and have almost similar
properties. Eventhough fluorine also is in group 7A, it is different from the other two because of
its small size and high electronagativity.
b) Oxygen and sulphur. They belong to group 6A of the periodic table. They both have six
valence electrons.
c) Lithium and potassium. They belong to group 1 and contains one valence electron.

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  • 1. a. Which elements are chemically similar to each other? Bromine Phosphorus Calcium Boron Nickel Iodine Fluorine b. Which elements are chemically similar to each other? Oxygen Iron Sulfur Aluminum Iodine Carbon c. Which elements are chemically similar to each other? Lithium Oxygen Lead Manganese Potassium Silicon
  • 2. Solution a) Bromine and iodine are chemically similar. Both comes in group 7A and have almost similar properties. Eventhough fluorine also is in group 7A, it is different from the other two because of its small size and high electronagativity. b) Oxygen and sulphur. They belong to group 6A of the periodic table. They both have six valence electrons. c) Lithium and potassium. They belong to group 1 and contains one valence electron.