chemistry vocab

123456789101112131415161718192021
Across
  1. 3. surrounds the nucleaus
  2. 7. found in the nucleaus
  3. 11. the number of atoms in an element
  4. 13. a formula that reveals the elements in a substance
  5. 14. atoms in the same _ have the same amout of valence electrons
  6. 15. the number of molecules
  7. 17. how to measure an elements atomic mass
  8. 18. a change in size,shape or state of matter
  9. 19. elements on the _ side of periodic table are very reactive
  10. 20. has a neutral charge
  11. 21. found in the electron cloud
Down
  1. 1. ___ electrons that determine the stability of an element
  2. 2. located in the center of an atom
  3. 4. smallest part of an element
  4. 5. elements on the _ side of the periodic table are stable
  5. 6. a change where a substance turns into a new substance with new properties
  6. 8. all atoms that are the same size are in the same ___
  7. 9. organized table where all the elements are
  8. 10. proton,nuetron,electron
  9. 12. stability is another word for it
  10. 16. how many pieces of evidence we can see with a chemical change