Across 2. the arrangement and type of atoms in a substances 4. anything that has mass and takes up space 7. the ability to dissolve in a liquid 11. the ability of a substance to combine with or change into one or more other substances. 12. a change that breaks the bonds between atoms and causes the creation of a new substance 14. a state of matter where particles are far apart and move freely past each other 17. a state of matter where particles are packed together, but able to flow past each other 18. the separation of a mixture based on particle size 19. a substance with a uniform and constant composition 20. the particles in the mixture are not evenly distributed

Down 1. the separation of a mixture based on boiling points 3. a state of matter where atoms are closely packed in an organized pattern 5. matter that is composed of two or more different substances 6. a change which alters a substance without changing its composition 8. a property that can be observed without changing the identity of the substances 9. Two or more different elements/atoms that are chemically combined in fixed proportions and can be decomposed by chemical means. 10. the separation of a mixture based on the evaporation of a liquid 11. the study of matter and how it changes 13. the particles in the mixture are evenly distributed 15. a homogeneous mixture where something is completely dissolved in water 16. pure substances composed of only one type of atom