Introduction to Molecules
Explore the basic concepts of molecules, their composition, and their importance in everyday life with this Grade 8 science worksheet.
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Introduction to Molecules
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Read each question carefully and answer to the best of your ability. Use the provided space for your answers.
1. What is the smallest unit of a chemical element that retains its chemical properties?
Molecule
Atom
Compound
Proton
2. Which of the following is an example of a molecule made up of two different types of atoms?
O₂ (Oxygen gas)
He (Helium)
H₂O (Water)
Au (Gold)
3. A molecule is formed when two or more atoms are chemically together.
4. The chemical symbol for a water molecule is .
5. Explain the difference between an atom and a molecule.
6. All molecules are made up of only one type of atom.
True
False
7. Molecules are constantly in motion.
True
False
Use the words below to complete the sentences.
8. Water (H₂O) is a because it is made of two different types of .
9. The smallest particle of an element is an .