Across
- 2. an atom or group of atoms that has a positive or negative charge
- 3. a measure of the space occupied by a sample of matter
- 9. a substance that contains two or more elements chemically combined in a fixed proportion; generally held together by ionic bonds
- 12. negatively charged subatomic particle
- 13. the tiny, dense central portion of an atom, composed of protons & neutrons
- 15. the smallest particle of an element that retains its identity in a chemical reaction
- 17. an element that tends to have properties that are similar to those of metals and nonmetals
- 19. neutral subatomic particle
- 24. any atom or group of atoms with a positive charge
- 26. a measure of the amount of matter that an object contains
- 29. mixture that is not uniform in composition; components are not evenly distributed throughout the mixture
- 30. matter that has a uniform and definite composition; either an element or a compound; pure matter of some kind
- 31. the simplest form of matter that has a unique set of properties; an element cannot be broken down into simpler substances
- 32. change that produces matter with a different composition than the original matter
- 33. electrostatic attraction that binds oppositely charged ions together
Down
- 1. any atom or group of atoms with a negative charge
- 4. a physical blend of two or more substances that are not chemically combined
- 5. an element that tends to be a poor conductor of heat and electric current
- 6. a positively charged subatomic particle found in the nucleus of an atom
- 7. one of a class of metals that are good conductors of heat and electric current; also ductile, malleable, and shiny
- 8. atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas
- 10. the ratio of the mass of an object to its volume
- 11. a term used to refer to the mass of one more of any substance
- 14. the weighted average of the masses of the isotopes of an element
- 16. 6.022 x 10^23 of anything
- 18. mixture that is uniform in composition; components are evenly distributed and not easily distinguished
- 20. anything that has mass and occupies space
- 21. a change during which some properties of a material change, but the composition of the material does not change
- 22. a proposed explanation for an observation or a prediction regarding the outcome of an experiment
- 23. the man after which the mole number is named
- 25. the number of wave cycles that pass a given point per unit of time
- 27. the unit of frequency; equal to one cycle per second
- 28. electron in the highest occupied energy level of an atom