Periodic Table (CH10)

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Across
  1. 2. Scientist who arranged elements by atomic number to create the modern periodic table
  2. 3. This element helps you breathe
  3. 4. This nonmetal is found in all living things and fuels like coal
  4. 7. This element is in table salt when combined with sodium
  5. 9. Elements with properties of both metals and nonmetals
  6. 11. Series of mostly radioactive elements used in nuclear energy and medicine
  7. 12. Series of shiny metals used in magnets and electronics
  8. 15. Scientist who arranged elements by atomic mass and predicted undiscovered elements
  9. 17. This type of element can conduct electricity under certain conditions
  10. 18. These elements are shiny and malleable
  11. 19. The element with atomic number 1
  12. 21. Reaction where fuel reacts quickly with oxygen, producing heat and light
  13. 23. This group is unreactive and found in Group 18
  14. 24. This element is used in computer chips and solar panels
  15. 25. The chemical reaction that forms rust on iron
Down
  1. 1. Property that generally increases in the middle of a period and decreases at the ends
  2. 5. The number of protons in an atom
  3. 6. Electrons in the outermost shell used for bonding
  4. 8. Metals This group of metals is very reactive and found in Group 1
  5. 10. Group 17 elements are called this
  6. 13. This property allows metals to be hammered or rolled into thin sheets
  7. 14. Property that usually increases across a period and down a group
  8. 16. Group 2 metals are called this
  9. 20. This property allows metals to be stretched into thin wires
  10. 22. This metal is used to build bridges and tools