Across
- 2. A cloudy mixture
- 3. invisible negatively charged particle that orbits the nucleus of an atom
- 8. An experiment in which one or more products of a chemical reaction can escape
- 9. substance made of only one kind of matter
- 10. Chemical reaction that releases energy
- 12. heterogeneous mixture
- 14. change in the appearance or state of a substance
- 16. slow chemical change that occurs when oxygen in the air reacts with a metal
- 17. Description of a solid that can be stretched into a long wire
- 18. ability of a substance to conduct electricity
- 19. new substance produced in a chemical reaction between reactants
- 20. Chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 22. neutral particle in the nucleus of an atom
- 23. Substance that helps a chemical reaction to proceed more quickly
- 24. Vertical column of elements in the periodic table
Down
- 1. shiny, malleable, ductile, element that conducts electricity
- 2. An experiment in which all reactants and all products of a chemical reaction are accounted for
- 4. pure substance formed when non-matals combine
- 5. dull, brittle, element that does not conduct electricity
- 6. horizontal row of elements in the periodic table
- 7. Catalyst involved in chemical reactions in living things
- 11. a reaction that takes place when two or more substances react to form new substances
- 13. substance that reacts with another substance or substances in a chemical reaction to create new substances with different properties
- 15. Chemical reaction that absorbs energy
- 20. respiration Chemical reacton that takes place in cells (reacts with oxygen to produce energy)
- 21. compound that dissolves in water to form a solution with a PH higher than 7