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    1. What is boiling point?

    2. What is an element?

    3. What does density depend on?

    4. What is NAOH?

    5. What is an atom?

    6. How quickly diffusion happens depends on?

    7. What can molecules be made of?

    8. Can the particles in the liquid be compressed?

    9. Can the particles in a solid be compressed?

    10. Can the particles in gas flow?