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Across 2. LOCATED PRIMARILY ON THE LEFT 7. NUMBER WRITTEN BEFORE A COMPOUND OR ELEMENT TO BALANCE 8. THE CHARGE OF THE NUCLEUS OF AN ATOM 9. THIS REACTION HAS WATER AS A PRODUCT ALWAYS 10. ONE SWITCH OF REACTANTS TAKES PLACE 15. NAMES THE ELEMENT SAME NUMBER OF PROTONS 16. HAVE A NEGATIVE CHARGE 18. DIFFERENT MASS NUMBER THAN ON PERIODIC TABLE 20. REACTION WITH AT LEAST TWO REACTANTS AND ONE PRODUCT 21. SEPARATES REACTANTS AND PRODUCTS 22. A NEGATIVELY CHARGED ION

Down 1. THESE ARE IN VERTICAL COLUMNS 3. SHOWS THE NUMBER OF VALANCE ELECTRONS 4. THERE ARE SEVEN OF THESE ON THE PERIODIC TABLE 5. LOCATED IN BETWEEN METALS AND NONMETALS 6. THIS REACTION HAS ONLY ONE REACTANT USUALLY 11. PROTONS PLUS NEUTRONS EQUAL 12. POOR CONDUCTORS OF HEAT, NO LUSTER 13. THESE HAVE THE SAME NUMBER OF PROTONS AND NEUTRONS 14. HAS NO CHARGE 17. A POSITIVELY CHARGED ION 19. ITS WHAT IS FORMED IN A CHEMICAL REACTION