Across
- 1. substance present before a chemical reaction and takes place in it
- 3. the building block of matter; the smallest possible particle of an element
- 4. attraction between two atoms as a result of sharing or transferring valence electrons
- 6. a change in a substance that results in one or more new substances being formed that have different physical and chemical properties than the original substance
- 7. process by which particles in solution are evenly distributed throughout the solvent by Brownian motion
- 9. process by which one substance, the solute, is broken up into smaller pieces by and distributed within a second substance, the solvent
- 10. substance that produces hydroxide ions or accepts hydrogen ions in solution
- 13. class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
- 14. substance formed during a chemical reaction
- 15. tendency of energy to disperse and become less available to do work
- 16. a change in a substance that does not change the identify of the substance
- 21. a measurement of the average speed of the particles within a substance
- 23. organic compound comprised of the elements carbon, hydrogen, and oxygen
- 24. naturally occurring catalyst, usually a protein
- 26. the smallest particle of a covalently bonded compound
- 27. 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. attraction of particles in one substance for particles in a different substance
- 5. substance that binds to an enzyme and reduces its activity
- 8. attraction of like particles within polar substances
- 11. substance that produces hydrogen ions in solution
- 12. substance that changes the rate of a chemical reaction but is not itself used up or affected by the reaction
- 15. a pure substance made of only kind of atom
- 17. class of simple organic compounds important in living things as a source of energy and structure
- 18. the ability to do work; the driver of the physical and chemical processes necessary for life
- 19. having an uneven distribution of electrical charge
- 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. class of organic compounds that serve as the building blocks for the information storage molecules in DNA and RNA