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