Across
- 5. measure of the concentration of hydrogen ions (H+) in a solution
- 6. biological catalysts that speed up the rate of chemical reactions in biological processes
- 8. positively charged particle
- 10. pure substance that cannot be broken down into other substances by physical or chemical means
- 11. large molecule formed by joining smaller organic molecules together
- 13. compound made of small carbon compounds called amino acids
- 15. attractive force between positive & negative regions that hold molecules together
- 18. substance that releases hydroxide ions (OH-) when dissolved in water
- 21. negatively charged particle
- 22. electrical attraction between 2 oppositely charged atoms or groups of atoms
- 24. building block of matter
- 25. substance that is dissolved in the solvent
- 26. a homogenous mixture formed when a substance is dissolved in another substance
- 27. substance that releases hydrogen ions (H+) when dissolved in water
- 29. center of the atom, where neutrons & protons are located
- 31. substance that lowers the activation energy needed to start a chemical reaction
- 33. chemical bond that forms when electrons are shared
- 34. molecule made mostly of carbon and hydrogen that make up fats, oils, & waxes
- 36. subunit of nucleic acid formed from a sugar, a phosphate, & a nitrogenous base
Down
- 1. substance in which another substance is dissolved
- 2. atom of the same element that have different numbers of neutrons
- 3. particle that has no charge
- 4. substances formed during a chemical reaction, shown on the right side of a chemical equation
- 5. molecule made from repeating units of identical or nearly identical compounds called monomers
- 7. compound composed of carbon, hydrogen, & oxygen in a ratio of 1 oxygen and 2 hydrogen atoms for each carbon atom
- 9. weak interaction involving a hydrogen atom & a fluorine, oxygen, or nitrogen atom
- 12. minimum amount of energy needed for reactants to form products in a chemical reaction
- 13. molecules that have an unequal distribution of charges
- 14. process by which atoms or groups of atoms in substances are reorganized into different substances
- 16. reactant that binds to an enzyme
- 17. starting substances in a chemical reaction, shown on the left side of a chemical equation
- 19. small compounds that are made of carbon, nitrogen, oxygen, hydrogen, & sometimes sulfur
- 20. pure substance formed when 2 or more different elements combine
- 23. complex macromolecule that stores and transmits genetic information
- 28. combination of 2 or more substances in which each substance retains its individual characteristics and properties
- 30. compound in which the atoms are held together by covalent bonds
- 32. specific location where a substrate binds on an enzyme
- 35. mixture that can react with acids or bases to keep pH within a particular range
- 37. atom that has lost or gained one or more electrons