Across
- 3. gases- group 18 elements in the periodic table;the most stable and unreactive elements
- 5. system- an experiment in which one or more products of a chemical reaction can escape
- 7. shiny, malleable, ductile element that conducts electricity
- 10. pure substance that cannot be broken down into other substances; substance made up of only one type of atom
- 11. a substance with a sour taste.
- 12. mass- mass of one atom of an element calculated from the total number of protons,neutrons, and electrons of that atom
- 13. change of state from a solid to a liquid
- 15. mass of a substance that can dissolve in a given amount of solvent to form a saturated solution at a given temperature
- 16. such a substance, as dissolved sugar or salt in solution.
- 18. to make or form by combining parts, elements.
- 20. element that has both metallic and nonmetallic properties
- 24. system- an experiment in which all reactants and all products of a chemical reaction are accounted for
- 25. number- number of protons in the nucleus of one atom of an element
Down
- 1. one of the electrically charged particles formed in a gas by electric discharge or the like.
- 2. elements in a family all have similar chemical properties
- 4. any of various proteins, as pepsin, originating from living cells and capable of producing certain chemical changes in organic substances by catalytic action, as in digestion.
- 6. anything extremely small; a minute quantity
- 8. metals- any of a group of soft, white, low-density, low-melting, highly reactive metallic elements
- 9. any substance that undergoes a chemical change in a given reaction.
- 14. the act or process of burning.
- 17. a substance that causes or accelerates a chemical reaction without itself being affected.
- 19. any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.
- 21. invisible negatively charged particle that orbits the nucleus of an atom
- 22. mass per unit volume.
- 23. compound pure substance formed when at least one metal and one non-metal combine