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3. quantitative measure of inertia, a fundamental property of all matter.
4. a characteristic of a substance that can be observed or measured without changing the identity of the substance
7. a subatomic particle that is found in all atoms.
9. a specific characteristic of a substance like an element or a compound, relating to how it can change as a result of a reaction.
11. the basic building blocks of matter.

1. The number of protons in a nucleus.
2. the amount of space occupied by any three-dimensional solid.
3. any substance that has mass and takes up space by having volume.
5. subatomic particles found inside the nucleus of every atom.
6. the mass of the object compared to its volume.
8. A substance that cannot be broken down into simpler substances by chemical means.
10. a subatomic particle with a positive electrical charge.