Chemistry Unit Essential Terms

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Across
  1. 5. 1 or 2 letters to name an element
  2. 6. brittle, not malleable or ductile, poor conductors
  3. 8. heating Endothermic cooling
  4. 10. the number of atoms must be the same on both sides of the equation
  5. 12. a substance that cannot chemically be broken down into a simpler substance
  6. 13. energy level or shell
  7. 17. electrons on outside layer of atoms, form bonds with other atoms
  8. 19. a substance formed when 2 or more chemicals are chemically bonded together
  9. 22. the ingredients produced after the reaction takes place
Down
  1. 1. mass of an element
  2. 2. made periodic table
  3. 3. gaseous elements with very low chemical reactivity, odorless, colorless, monatomic gases
  4. 4. carries a negative charge
  5. 7. characteristics of both metals and nonmetals
  6. 9. the ingredients present before the reaction begins
  7. 11. carries a positive charge
  8. 14. both the number of protons and electrons
  9. 15. carries a neutral charge
  10. 16. a vertical column of elements on the periodic table
  11. 18. a form of matter that may not be further broken down using any chemical means
  12. 20. solid, shiny, conductive, malleable, ductile
  13. 21. the center of an atom
  14. 22. a horizontal row of elements on the periodic table