Across
- 3. The horizontal rows on the Periodic Table
- 7. The amount of matter in an object.
- 9. A type of change that alters the physical properties of a substance but does not change its composition.
- 11. PV=PV
- 14. A characteristic of matter that can be observed or measured without changing the sample's composition - for example, density, color, taste, hardness, and melting point.
- 16. A form of matter that has its own definite shape and volume, is incompressible and expands only slightly when heated.
- 17. poor conductors of heat and electricity
- 19. A technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of another material.
- 21. A form of matter that flows, has constant volume and takes the shape of its container.
- 22. An element that has both metallic and nonmetallic properties; examples of metalloids include B, Ge, Si, and Te.
- 24. matter that has the same composition and properties throughout
- 25. A technique that uses a porous barrier to separate a solid from a liquid.
- 26. A physical blend of two or more pure substances in any proportion in which each substance retains its individual properties; can be separated by physical means.
- 29. a chemical substance formed as a result of a chemical reaction
- 30. exists at high temperatures, consists of charged particles
- 32. A process involving one or more substances changing into new substances; also called a
- 36. States that mass is neither created nor destroyed during a chemical reaction but is conserved.
- 38. A percentage determined by the ratio of the mass of each element to the total mass of the compound.
- 40. PV=nRT
- 42. States that when different compounds are formed by the combination of the same elements, different masses of one element combine with the same mass of the other element in a ratio of small whole numbers.
- 44. One that does not have a uniform composition and in which the individual substances remain distinct.
Down
- 1. Gaseous state of a substance that is a liquid or a solid at room temperature.
- 2. A technique that can be used to physically separate most homogeneous mixtures based on the differences in the boiliing points of the substances involved.
- 3. A chart that organizes all known elements into a grid of horizontal rows (periods) and vertical columns (groups or families) arranged by increasing atomic number.
- 4. The ability or inability of a substance to combine with or change into one or more new substances.
- 5. A physical property, such as mass, length, and volume,that is dependent upon the amount of substance present.
- 6. (chemistry) a change directly from the solid to the gaseous state without becoming liquid
- 8. A pure substance that cannot be broken down into simpler substances by physical or chemical means.
- 10. separation technique that produces pure solid particles of a substance from a solution that contains the dissolved substance.
- 12. A chemical combination of two or more different elements; can be broken down into simpler substances by chemical means and has properties different from those of its component elements.
- 13. One that has a uniform composition throughout and always has a single phase; also called a solution.
- 15. States that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.
- 18. Anything that has mass and takes up space
- 20. relates temperature and pressure
- 23. relates temperature, pressure, and volume
- 27. vertical columns of elements
- 28. A physical property that remains the same no matter how much of a substance is present.
- 31. relates volume and amount of substance
- 32. (At constant pressure) relates temperature and volume
- 33. a change from one state (solid or liquid or gas) to another without a change in chemical composition
- 34. A form of matter that flows to conform to the shape of its container, fills the container's entire volume and is easily compressed.
- 35. An extremely unreactive group 18 element.
- 37. The physical forms in which a substance can exist
- 39. the basic unit of an element.
- 41. The majority of elements in the Periodic Table conductor of heat, ductile, malleable, lustrous
- 43. a chemical substance that is present at the start of a chemical reaction