Chemistry Crossword

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Across
  1. 3. positively charged particle in the nucleus of an atom
  2. 4. element that has both metallic and non-metallic properties
  3. 5. vertical column of elements in the periodic table of elements
  4. 13. group 2 elements in the periodic table
  5. 16. no additional material is allowed to enter or leave
  6. 17. abbreviation of atomic mass
  7. 18. a chemical reaction that absorbs heat energy
  8. 19. neutral particle in the nucleus of an atom
  9. 22. most stable and unattractive elements
Down
  1. 1. when two or more materials react and crate new materials
  2. 2. the most reactive metal on the table of elements
  3. 3. when a material changes from one state to another
  4. 6. the sum of the number of protons and neutrons in an atom
  5. 7. slow chemical change that occurs when oxygen in the air reacts with a metal
  6. 8. a chemical reaction that takes place in the cells in your body
  7. 9. vertical column of elements in the periodic table
  8. 10. combination of symbols that represent a compound
  9. 11. group 17 elements in the periodic table
  10. 12. a chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
  11. 13. group one in the periodic table
  12. 14. dull, brittle element that does not conduct electricity
  13. 15. a chemical reaction that releases heat energy
  14. 20. horizontal row of elements in the periodic table
  15. 21. shiny, malleable, ductile element that conducts electricity
  16. 23. invisible negatively charged particle that orbits the nucleus of an atom