Periodic Table Models and Reaction Reasoning Worksheet
📝 Worksheet hard ⏱️ 20 minutes 10 problems
Periodic Table Models and Reaction Reasoning Worksheet
Grade 8 Science LearnCrux.com
Name:
Date:
Directions
- Fill in each blank carefully.
- Circle or mark the best answer for each multiple-choice question.
- Match each prompt to the best option before writing your answer.
- Use the larger space to show your thinking on word problems.
1. Match the model to its main purpose: periodic table
Match with:
Answer:
2. The starting substances in a chemical reaction are called __.
3. Why is a compound different from an element?
4. Which observation gives the strongest evidence that a chemical reaction happened?
5. Chemical equations help show that atoms are __ during reactions.
6. Match the idea to the best explanation: conservation of mass
Match with:
Answer:
7. Why can water not be classified as a single element?
8. Which tool is most helpful when students want to compare oxygen, copper, and carbon as elements?
9. Why might copper and oxygen appear in different regions of the periodic table?
10. Which substance is a compound?
📋 Teacher Answer Key
1. organizes elements so scientists can compare them
2. reactants
3. A compound contains different kinds of atoms joined together, while an element has only one kind of atom
4. A gas formed and the temperature changed
5. rearranged
6. the total amount of matter stays the same even when atoms are regrouped
7. Water contains hydrogen and oxygen atoms, so it is a compound instead of one element
8. the periodic table
9. The table is organized to show differences in element structure and properties
10. carbon dioxide