Molecular Elements and Diatomic Molecules Quiz
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Questions and Answers

What is the key characteristic that defines a molecular element?

  • It is a mixture of elements that are not chemically combined.
  • It consists of atoms of the same element joined together. (correct)
  • It is a pure substance composed of two or more different elements.
  • It is a compound formed by chemically joining different elements.
  • How many diatomic molecular elements are mentioned in the given text?

  • 8
  • 6
  • 5
  • 7 (correct)
  • What is the meaning of the prefix 'di-' in the term 'diatomic molecule'?

  • It refers to the molecule consisting of two atoms. (correct)
  • It indicates that the molecule is a compound.
  • It refers to the presence of two different types of atoms.
  • It signifies that the molecule is a mixture of elements.
  • What is the nonsensical word provided to help remember the seven diatomic molecules?

    <p>HOF BRINCI</p> Signup and view all the answers

    What is the purpose of using a nonsensical word like 'HOF BRINCI' in the text?

    <p>To provide a mnemonic device for remembering the diatomic molecules.</p> Signup and view all the answers

    What is the primary composition of air according to the passage?

    <p>80% nitrogen molecules and 20% oxygen molecules</p> Signup and view all the answers

    What is the chemical formula for a nitrogen molecule?

    <p>N2</p> Signup and view all the answers

    What does the subscript in a chemical formula represent?

    <p>The number of atoms of the preceding element in the molecule</p> Signup and view all the answers

    What is the purpose of a chemical formula?

    <p>To indicate the type and number of atoms in a pure substance</p> Signup and view all the answers

    What is the definition of a molecule according to the passage?

    <p>Two or more atoms of the same or different elements that are chemically joined together in a unit</p> Signup and view all the answers

    According to the Writing Tip, what should be done before writing a science report?

    <p>Say the purpose of the report aloud and turn it into a question</p> Signup and view all the answers

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