Across
- 1. A substance that is present before a chemical reaction and takes part in it, usually shown o the left-hand side of a chemical equation.
- 3. The building block of matter; 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 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.
- 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 (OH) or accept hydrogen ions (H') in solution
- 13. A class of non polar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things.
- 14. The substance formed during a chemical reaction, usually indicated o 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 a 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 composed 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 contently 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 i 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 a polar substance.
- 11. A substance that can produce hydrogen ions (H') in solution
- 12. A substance that changes he rate of a chemical reaction but 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 is 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 contently bonded compound containing the element carbon
- 22. The physical stuff 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