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CBSE › Class 9 › Science › Atomic Foundations of Matter (Class 9 NCERT New)
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1. What do we call a chemical substance made up of 2 or more different types atoms bonded together?

2. Which of these items is made up of one or more molecules?

3. Which of the following statements is not true about an atom?

4. molecular formula of copper and bromine is

5. Atomic number of oxygen is

6. valency of helium is

7. chemical formula of aluminium and hydrogen is

8. Molecular mass is defined as the:

9. Atomic mass of sodium is

10. Which of the following represents a correct chemical formula?

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