Unit one and two vocabulary

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Across
  1. 2. the basic unit of a chemical element
  2. 5. Chemical reactions that absorb energy
  3. 9. The substances which participate in a chemical reaction
  4. 12. stored in the bonds of chemical compounds
  5. 15. a homogeneous mixture of two or more substances
  6. 16. an uncharged atomic particle that has a mass nearly equal to that of the proton
  7. 17. the process of transferring heat through air or liquid currents
  8. 18. a stable subatomic particle with a charge of negative electricity
  9. 19. ions that are positively charged
  10. 21. the number of times a point on a wave passes a fixed reference point in one second
  11. 23. a subatomic particle with a positive electrical charge
  12. 24. when the number of protons exceeds the number of electrons
Down
  1. 1. A form of a chemical element in which the atoms have the same number of protons and different neutronsanion ions that are negatively charged
  2. 3. the transfer of energy through electromagnetic waves
  3. 4. a reaction or process accompanied by the release of heat
  4. 6. conserved property of certain subatomic particles that determines their electromagnetic interaction
  5. 7. distance between corresponding points of two consecutive waves
  6. 8. If an atom has a greater number of electrons than protons, it has a negative charge
  7. 10. the study of the structure, properties, composition, reactions, and preparation of carbon containing compounds
  8. 11. the process by which heat energy is transmitted through collisions between neighboring atoms or molecules
  9. 12. a simple substance that cannot be broken down into smaller parts or changed into another substance
  10. 13. a column in the periodic table of the chemical elements
  11. 14. substances made from a chemical reaction
  12. 20. a horizontal row of the periodic table
  13. 22. a substance made up of two or more different chemical elements combined in a fixed ratio