Across
- 3. weak attraction between a hydrogen atom and another atom
- 6. atom that has a positive or negative charge
- 7. pure substance that consists entirely of one type of atom
- 10. energy input that is needed for a reaction to begin
- 11. macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
- 16. elements or compounds that enter into a chemical reaction
- 17. slight attraction that develops between oppositely charged regions of nearby molecules
- 19. negatively charged particle located in the space surrounding the nucleus
- 21. compound with an amino group on one end and a carboxyl group on the other end
- 24. type of mixture in which all the components are evenly distributed
- 27. attraction between molecules of the same substance
- 28. protein catalyst that speeds up the rate of specific biological reactions
- 31. type of bond between atoms in which the electrons are shared
- 32. process that changes, or transforms, one set of chemicals into another set of chemicals
- 33. reactant of an enzyme-catalyzed reaction
- 35. the center of an atom, which contains the protons and neutrons
- 37. material composed of two or more elements or compounds that are physically mixed together but not chemically combined
Down
- 1. force of attraction between different kinds of molecules
- 2. macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorous
- 4. macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair
- 5. substance that is dissolved in a solution
- 6. chemical bond formed when one or more electrons are transferred from one atom to another
- 8. smallest unit of most compounds that displays all the properties of that compound
- 9. subunit of which nucleic acids are composed; made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
- 12. compound that prevents sharp, sudden changes in pH
- 13. mixture of water and non-dissolved material
- 14. compound made of carbon, hydrogen, and oxygen atoms; types of nutrients that are the major source of energy to the body
- 15. compound that produces hydroxide ions (OH-) in solution; solution with a pH of more than 7
- 18. the basic unit of matter
- 20. elements or compounds produced by chemical reactions
- 22. substance formed by the chemical combination of two or more elements in definite proportions
- 23. small chemical unit that makes up a polymer
- 25. scale used to measure the concentration of H+ ions in a solution
- 26. one of several forms of a single element, which contains the same number of protons but different number of neutrons
- 29. compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7
- 30. molecule composed of many monomers; makes up macromolecules
- 34. dissolving substance in a solution
- 36. substance that speeds up the rate of a chemical reaction