Chemistry

4. Weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH.
5. Substance that speeds up the rate of chemical reactions without being consumed by the reaction
7. Any compound that releases H+ ions into the solution
8. Small chemical unit that makes up a polymer
9. Acids: Macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorous
13. Holds together atoms in a compound
14. Energy needed to get a reaction started
16. indicate the concentration of H+ ions in a solution
19. Atoms of the same element that differ in the number of neutrons they contain
20. The basic unit of matter
21. Compound with an amino group on one end and a carboxyl group on the other end
23. Type of mixture in which all the components are evenly distributed
25. The center of the atom, formed of protons and neutrons
28. Attraction between molecules of the same substance
29. Sharing of electrons
33. The elements or compounds produced by a chemical reaction
34. The substance that dissolves the solute
37. Material composed of two or more elements or compounds that are physically mixed together but not chemically combined
38. Elements or compounds that engage in a chemical reaction
39. Subunit of which nucleic acids are composed; made up of 5-carbon sugar, a phosphate group, and a nitrogenous base

1. Compound made of carbon, hydrogen, and oxygen atoms; major source of energy to the body
2. reactant of the enzyme-catalyzed reaction
3. Slight attraction that develops between oppositely charged regions of nearby molecules
6. Mixtures of water and nondissolved material
10. The attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge
11. Formed when one or more electrons are transferred
12. Attraction between molecules of different substances
15. Protein catalysts that speeds up the rate of a specific biological reaction
17. Macromolecules that are made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes. not soluble in water
18. macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body Mor growth and repair
22. The amount of energy needed to raise its temperature by making its molecules move faster
24. A process that changes, or transforms, one set of compounds into another
26. Pure substance that consists entirely of one type of atom
27. Negatively and positively charged atoms
30. A compound that produces OH- ions in a solution
31. Substance formed by the chemical combination of two or more elements in definite proportions
32. Molecule composed of many monomers; makes up a macromolecule
34. The substance that is dissolved
35. Structure that results when atoms joined together by a covalent bond
36. Negatively charged particle