Across
- 1. a substance that is present before a chemical reaction and takes part in it, usually shown on the left-hand side of a chemical equation
- 3. the building block of matte; the smallest possible particle of an element
- 4. an attraction between two atoms as a result of sharing or transferring valence electrons
- 6. a change in substance that results in one or more new substances being formed that have different physical and chemical properties than those of the original substance
- 7. the process by which particles in solution are evenly distributed throughout the solvent by Brownian motion
- 9. the process by which one substance, the solute, is broken up into smaller pieces by and distributed within a second substance, the solvent
- 10. a substance that can produce hydroxide ions or accept hydrogen ions in solution
- 13. a class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
- 14. the substances formed during a chemical reaction, usually indicated on the right-hand side of a chemical equation
- 15. the tendency of energy to disperse and become less available to do work
- 16. a change in substance that does not change the identity of the substance
- 21. a measurement of the average speed of the particles within a substance
- 23. an organic compound comprised of the elements carbon, hydrogen, and oxygen; includes sugars, starch, and cellulose
- 24. a naturally occurring catalyst, usually a protein
- 26. the smallest particle of a cocovalently bonded compound
- 27. a class of organic compounds that serve as the building blocks of proteins
Down
- 2. a pure substance made from two or more elements that are chemically combined
- 3. the attraction of particles in one substance for particles in a a different substance
- 5. a substance that binds to an enzyme and reduces its activity. thus slowing a chemical reaction that the enzyme catalyzes
- 8. the attraction between like particles within polar substances
- 11. a substance that can produce hydrogen ions in solution
- 12. a substance that changes the rate of a chemical reaction but is is not itself used up or affected by the reaction
- 15. a pure substance made of only one kind of atom
- 17. a class of simple organic compounds important in living things as a source of both energy and structure
- 18. the ability to do work. Especially in biology,the driver of the physical and chemical processes necessary for life
- 19. quality of molecules having an uneven distribution of electrical charge, resulting in some regions of a molecule having negative charge while others are positive
- 20. a covalently bonded compound containing the element carbon
- 22. the physical stuff that makes up the universe. Anything that occupies space and has mass
- 25. a class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA