Chemical Formulas
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Questions and Answers

What does a subscript number next to an element's symbol indicate in a chemical formula?

  • The atomic number of that element
  • The molecular weight of that element
  • The number of atoms of that element in the compound (correct)
  • The electronegativity of that element
  • In the chemical compound CaCO₃, how many atoms of oxygen are present?

  • 4
  • 1
  • 2
  • 3 (correct)
  • What is the chemical name for baking powder?

  • Sodium Chloride
  • Sodium Hydroxide
  • Sodium Carbonate
  • Sodium Bicarbonate (correct)
  • Which compound is known as Epsom salt?

    <p>MgSO₄</p> Signup and view all the answers

    What does the absence of a subscript number next to an element's symbol in a chemical formula indicate?

    <p>There is only one atom of that element in the compound</p> Signup and view all the answers

    What is the main reason there are so many different types of substances in the world?

    <p>Elements combine with each other to form molecules and new substances</p> Signup and view all the answers

    What is an example of an element molecule?

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

    Which type of molecule is water considered to be?

    <p>Compound molecule</p> Signup and view all the answers

    What are chemical bonds in relation to elements and molecules?

    <p>The glue that holds elements together in molecules</p> Signup and view all the answers

    What do chemists use chemical formulas to show?

    <p>The ratio of elements and how many atoms of each element there are in a chemical compound</p> Signup and view all the answers

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