Using Atoms and Ions to Determine Molecular Formulas


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question 1 of 3

What information can you retrieve from a molecular formula?

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1. Which of the following best describes this molecular formula H2O? (Note the 2 is subscripted)

2. Which of the following is a true statement?

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About This Quiz & Worksheet

Molecular formulas are used to describe the composition of molecules and you will have the opportunity to practice understanding these formulas with the help of these assessments. Some concepts you'll be tested on include subscripts and number of atoms in a molecule.

Quiz & Worksheet Goals

This quiz and worksheet will test you on the following:

  • The definition of a molecular formula
  • How to read a molecular formula
  • How to write the molecular formula of an ionic compound

Skills Practiced

This quiz and worksheet will test the following skills:

  • Interpreting information - verify that you can read information regarding the information in a molecular formula and interpret it correctly
  • Defining key concepts - ensure that you can accurately read common molecular formulas such as H2O
  • Knowledge application - use your knowledge to answer questions about how to write the molecular formula for an ionic compound

Additional Learning

For more information about molecular formulas, review the related lesson called Using Atoms and Ions to Determine Molecular Formulas. This lesson covers these additional topics:

  • Learn the difference between ozone and an oxygen molecule
  • Differentiate between positively and negatively charged molecules
  • Understand the definition of an ionic compound
  • Understand the proper notation in a molecular formula when the subscript is 1
  • Learn how to identify the types of elements and their quantities in a molecular formula