Across
- 1. A pure substance that consists of atoms with the same atomic number.
- 4. The state of matter in which particles are close together but able to move around.
- 5. A pure substance consisting of atoms of two or more elements that are chemically combined in a fixed ratio.
- 7. mixture A mixture that has a uniform appearance throughout; also known as a solution, especially of a solid dissolved in a liquid.
- 9. The measure of the amount of matter in an object.
- 11. The building block of matter; consists of protons, electrons, and (usually) neutrons.
- 13. The mass per unit volume of an object.
- 14. of definite proportions The law that states the masses of chemical substances combine in definite, characteristic integer ratios when forming compounds.
- 16. A physical combination of two or more substances in a changeable ratio.
- 17. model of matter A model that states that all physical matter exists in the form of particles.
Down
- 2. A particle consisting of two or more atoms covalently bonded together.
- 3. The space enclosed or occupied by an object.
- 6. A gas-like state of matter, formed at very high temperatures, that consists of high-energy ions and free elctrons.
- 8. The state of matter in which particles are far apart move rapidly, and have little interaction with each other.
- 9. Anything that has mass and occupies space.
- 10. The state of matter in which particles vibrate in fixed positions, giving a substance a fixed shape and volume.
- 12. mixture A mixture that does not have a uniform appearance since the combined substances are unevenly distributed.
- 15. The force of gravity acting on the matter in an object.
- 17. substance A material made only for one kind of element or compound.