Across
- 3. molecules composed of many monomers; makes up molecules
- 5. acid macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
- 9. pure substance that consists entirely of one type of atom
- 11. negatively charged particle that orbits the nucleus in the electron cloud
- 12. electron electron found in the outermost shell of an atom helps to determine bonding
- 13. small chemical unit that makes up a polymer
- 14. the basic unit of matter
- 16. macromolecule made mostly from carbon and hydrogen atoms includes fats, oils, and waxes
- 17. compound with an amino group on one end and a carboxyl group on the other end
- 20. reaction- a reaction that releases energy
- 22. a large organic molecule made up of many atoms
- 23. mass equal to the total number of protons and neutrons in the nucleus of an atom
- 24. positively charged particle found in the nucleus of an atom
Down
- 1. macromolecule made up of amino acids
- 2. reaction- a reaction that absorbs energy
- 4. symbol one or two-letter abbreviation for a chemical element name
- 6. compound made up of carbon, hydrogen, and oxygen atoms type of nutrient that is the major source of energy for the body
- 7. a combination of 2 or more elements connected by bonds
- 8. reactant of an enzyme-catalyzed reaction
- 9. biological catalysts
- 10. bond type of bond between atoms in which the electrons are shared
- 14. energy- energy that is needed to get a reaction started
- 15. substance formed as a result of a chemical reaction
- 18. particle found in the nucleus that has no charge
- 19. number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table (also equals the number of electrons in an element)
- 21. substance that speeds up the rate of a chemical reaction
- 25. elements or compounds that enter into a chemical reaction