Help your students build real understanding of formula models for pure through ninety questions that move from basic recognition to genuine reasoning about chemistry concepts.

Among the ninety questions, students will see prompts such as "What does the subscript in a chemical formula indicate about a pure substance?", "What information can be derived from the empirical formula CH₂?", and "What does the prefix 'di-' in a molecular formula indicate?"

What's Inside?

• 30 Multiple Choice questions as a separate print ready PDF worksheet
• 30 True or False questions as a separate print ready PDF worksheet
• 30 Short Answer questions as a separate print ready PDF worksheet
• Includes Answer Key with Explanations for all 90 questions
• 6 print ready PDF files, 26 pages in total

Each worksheet reviews the same core ideas from a different angle. Use them across a week or unit so students see the material three times without it ever feeling repetitive.

Ways to Use This Resource

• Homework or review before a test
• First look diagnostic to plan your unit
• Self checking practice, since every answer key includes explanations
• Bell ringers and warm ups during the unit
• No prep cover lesson for a substitute teacher

This set is part of a standards aligned chemistry unit. The unit also covers Reading Chemical Formulas as Atom, Writing Formulas to Represent, Subscripts and Ratios in Chemical, Formulas to Compare Substances, Classifying Substances by, and Naming Substances Using, all in the same three worksheet format, so your classroom routine stays familiar while the topic changes.

Suitable for Grade 9-12 chemistry classes, and for review at any point in the school year. This set is aligned to Virginia SOL standard CH.3a.