Across
- 2. / the measure of the amount of matter in an object
- 5. / a physical blend of two of more components
- 7. metal / a Group 1A metal
- 10. / mixing of gases
- 11. / matter that has a uniform and definite composition
- 13. / difference between the experimental value and the accepted value
- 14. / tiny central core of an atom composed of protons/electrons
- 15. / an atom/group of atoms with a positive or negative charge
Down
- 1. number / the number of protons in an element
- 2. / anything that has mass and takes up space
- 3. Method / * observe, hypothesis, experiment, theory, scientific law
- 4. / mixtures made of 2 or more elements, at least one of them being a metal
- 6. property / the condition of a substance that can be observed or measured without changing the substance's composition
- 8. / smallest particle of an element
- 9. / measure of the amount of space an object takes up
- 12. / simplest form of matter that has a unique set of properties; they can't be broken down