CHEMISTRY

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Across
  1. 2. transition elements and it is in the middle of the periodic table
  2. 3. mass of substance per unit volume
  3. 4. wherein substance can believe as acid or base at the same time
  4. 6. refers to the number of protons equal to number of electrons
  5. 8. Group or family
  6. 11. constant composition precision smallest estimated value
  7. 12. form strong bases
  8. 14. very stable and not reactive
  9. 15. a pure substance that cannot be broken down into simpler substance by a chemical reaction
  10. 17. refers us to the number of exact digits plus one digit which is estimated
  11. 21. responsible if condition is maintained
  12. 25. all molecular motion are dead
  13. 26. a measure of the full of gravity of the earth in a body
  14. 27. amount of matter in an object
  15. 28. combining of two or more elements in definite combination or ratio
  16. 30. a miniature solar system
Down
  1. 1. retain only 1 uncertain digit
  2. 5. number plus unit correct of significant figure
  3. 7. good element of a body
  4. 9. expansion due to increase kinetic energy of molecule
  5. 10. organized, systematic arrangement of known elements based on INCREASING atomic number
  6. 13. a negatively charged subatomic particle
  7. 16. distance from the nucleus to the last level
  8. 18. rare earth elements
  9. 19. smallest exact digit or line which is taken directly from device
  10. 20. salt-form
  11. 22. left side of the periodic table
  12. 23. building blocks of element
  13. 24. smallest estimated value
  14. 29. right side of the periodic table