Chemical reactions

Edit Answers
123456789101112
Across
  1. 1. what is the left side of the periodic table classified as?
  2. 4. what is a row on the periodic table called?
  3. 7. when heat is absorb from surroundings
  4. 10. a reaction in which fuel reacts with oxygen to release energy and light energy
  5. 11. what is the right side of the periodic table classified as
  6. 12. when the temperature decreases it is a ______ reaction
Down
  1. 2. when heat is released out to the surroundings
  2. 3. when the temperature increases it is a ______ reaction
  3. 5. what is the reaction of which is product is almost always carbon dioxide +water
  4. 6. what is a column called on the periodic table?
  5. 8. when a more reactive metal displaces a less reactive metal
  6. 9. what happens to the atomic number when we fo from one elect to another?