Across
- 1. a high-temperature physical state of matter in which atoms lose most of their electrons, particles that make up atoms
- 7. the study of non-organic compounds
- 10. any substance that has a definite composition
- 11. an element that has some characteristics of metals and some characteristics of nonmetals; some are semiconductors of electricity
- 15. relates to a substance’s ability to undergo changes that transform it into different substances
- 16. describes how shiny a substance is
- 17. matter that has definite volume and definite shape; particles are packed tightly, can vibrate but not move
- 20. a blend of two or more kinds of matter, each of which retains its own identity and properties
- 22. is carried out for the sake of increasing knowledge
- 23. the horizontal rows of the periodic table
- 26. a change in a substance that does not involve a change in the identity of the substance
- 28. is a physical change from one state to another
- 31. the smallest unit of an element that maintains the chemical identity of that element
- 32. the vertical columns of the periodic table
- 33. the substances that are formed by the chemical change
- 34. matter that has neither definite volume nor definite shape; particles are free-floating and collide with each other
- 35. can be drawn into a fine wire
- 36. the study of the properties and changes of matter and their relation to energy
- 37. a substance that can be broken down into simple stable substances; made from the atoms of two or more elements that are chemically bonded
- 38. anything that has mass and takes up space
- 39. an element that is a poor conductor of heat and electricity; many are gases and most solids are brittle and dull in appearance
- 40. a measure of the amount of matter
- 41. Energy can be absorbed or released in a change, it is not destroyed or created.
- 42. Physical and chemical properties change somewhat ______ across a period.
- 44. the use of mathematics and computers to understand the principles behind observed chemical behavior and to design and predict the properties of new compounds
Down
- 2. is generally carried out to solve a problem
- 3. the substances that react in a chemical change
- 4. Each group contains elements with _______ chemical properties.
- 5. the study of substances and processes occurring in living things
- 6. can be hammered or rolled into thin sheets
- 8. the amount of three-dimensional space an object occupies
- 9. elements in Group 18 of the periodic table; they are generally unreactive and are gases at room temperature
- 12. a characteristic that can be observed or measured without changing the identity of the substance
- 13. the study of carbon-containing compounds
- 14. do not depend on the amount of matter present
- 18. the study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes
- 19. typically involves the production and use of products that improve our quality of life
- 21. depend on the amount of matter that is present
- 24. a pure substance that cannot be broken down into simpler, stable substances and is made of one type of atom
- 25. a mixture that is uniform in composition (looks the same throughout)
- 27. a mixture that is not uniform in composition (looks different throughout)
- 29. the identification of the components and composition of materials
- 30. matter that has a definite volume but an indefinite shape; particles are close together and can slide around each other
- 37. a change in which one or more substances are converted into different substances
- 38. an element that is a good electrical conductor and a good heat conductor; most are malleable, ductile, and have luster.
- 43. a substance that has a fixed composition