science

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Across
  1. 2. what is the atomic number
  2. 4. whats a neutron
  3. 6. actinides are
  4. 8. what does the periodic table hold
  5. 13. copper is a
  6. 15. the energy level of a periodic table
  7. 16. electron being excited form the ground
  8. 18. the substance on which an enzyme acts
  9. 19. the centre where protons and neutrons are hold
  10. 20. is mercurey solid or liquid
  11. 21. who made the periodic table
  12. 23. water vapour that falls under ground
  13. 24. something that is used to keep cold or heat away
  14. 27. a something of electricity
  15. 29. an element whose properties are intermediate between those of metals and solid nonmetals
  16. 31. the charge of a lightbulb
  17. 34. transfer of energy
  18. 35. gives off heat
  19. 37. helium is a
  20. 38. a mix of elements
Down
  1. 1. when a solid is turned into a liquid
  2. 3. dispositive and disnegitive
  3. 5. type of metal in the 1st column
  4. 7. the third nobel gas
  5. 9. animals that use heat to see
  6. 10. a mixture of compounds
  7. 11. a common gas used in ballons
  8. 12. whats a proton
  9. 14. copper is a
  10. 17. number of valence electrons
  11. 18. the state or process that occurs when no more of something can be absorbed, combined with, or added
  12. 22. when heat meets water gas if formed what is it called
  13. 25. whats an electron
  14. 26. what is the other number on the element
  15. 28. gives off a negative output
  16. 30. whats a solid liquid and gas called
  17. 32. something you drink daily
  18. 33. what do electrons have
  19. 36. symbol of carbon trioxide