Across
- 2. reaction a reaction that releases energy
- 3. bilogical catalyst
- 4. mass equal to the total number of protons and nuetrons in the nucleus of an atom
- 10. reaction a reaction that absorbs energy
- 11. number the number of protons in the nucles of an atom
- 13. small chemical unit that makes up a polymer
- 14. symbol one-or two-leter abbreviation for a chemical element name
- 15. electron electron found in the outer most shell of an atom
- 16. the center of an atom
- 17. reactant of an enzyme-catalyzed reaction
- 18. acid macromolecule containing hydrogen
- 21. energy energy that is needed to get a reaction started
- 24. substance formed as a reslut of a chemicals
- 26. macromolecule made up of amino acids
- 27. acid compoud with an amino group
Down
- 1. compound made up of carbon,hydrogen and oxygen atoms
- 5. reaction process that changes or transforms, one set of chemicals into another set of chemicals
- 6. elements or compounds that enter into a chemical reaction
- 7. particle found in the nucleus
- 8. the basic unit of matter
- 9. subunit of which nucleic acids
- 10. pure substance that consist entirely of one type of atom
- 12. bond type of bond between atoms in which the electrons are shared
- 14. negatively charged particels
- 19. substance that speeds up the rate of a chemical reaction
- 20. molecules composed of many molecule made up of many atoms
- 22. a combination of 2 or more elements connected by bonds
- 23. positively charged particles found in the nucleus
- 25. macromolecule made mostly from carbon and hydrogen atoms