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Compounds and their formation

Quiz by Oak National Academy: KS3 Science (2)

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6 questions
Show answers
  • Q1
    What defines a chemical compound?
    A mixture of elements without chemical bonding.
    A solid element only.
    Two or more different elements chemically bonded.
    A single element in its pure form.
    30s
  • Q2
    In a chemical reaction, what happens when a chemical bond is formed?
    A new substance is created with different properties.
    It creates a mixture.
    Elements lose their properties.
    The elements separate physically.
    30s
  • Q3
    Which of the following words can be used to describe the following substance? Look at the diagram below.
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    30s
  • Q4
    Which of the following is a chemical compound?
    O₂ (Oxygen gas)
    N₂ (Nitrogen gas)
    He (Helium gas)
    H₂O (Water)
    30s
  • Q5
    Which statement is true about a chemical compound?
    It can be separated back into its elements by physical means.
    It is formed by a chemical reaction.
    It consists of only one type of atom.
    It has the same properties as its component elements.
    30s
  • Q6
    Why do compounds have different properties than the elements they are made from?
    A compound is a completely different chemical to the elements that made it.
    Only metals form compounds.
    Compounds are always changing their properties
    The elements forget about their properties.
    30s

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