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