science

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Across
  1. 2. change creates new product
  2. 4. negatively charged particles
  3. 5. a+b c+d = a+c b+d
  4. 7. a+b = a-b
  5. 11. how reactive something is
  6. 16. bond nonmetal + nonmetal
  7. 17. result of reactants
  8. 18. gives off heat
  9. 19. mass/volume
  10. 20. combust + ion
Down
  1. 1. a b+c = a+b c
  2. 3. makes up the atomic #
  3. 6. on right of periodic table
  4. 8. absorbs heat
  5. 9. bond nonmetal + metal
  6. 10. change changes physical characteristics
  7. 12. a-b = a+b
  8. 13. make the product
  9. 14. a+b=c
  10. 15. has neutral charge in nucleus