Introduction to Periodic Table

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Across
  1. 3. element in group 3, period 4
  2. 7. the group of elements between group 2 and 3 are known as the ___ metals
  3. 8. the most reactive metal
  4. 9. the most reactive non-metal
  5. 10. atomic mass is also the same as ___ number
  6. 12. group 7 halogens exist as __ molecules
  7. 14. name of group 7 elements
  8. 15. non-metals such as oxygen and chlorine tend to __ electrons to form anions
Down
  1. 1. name of group 1 metals
  2. 2. mass number of helium
  3. 4. the elements between metals and non-metals on the periodic table
  4. 5. vertical column in the periodic table
  5. 6. horizontal row in the periodic table
  6. 11. metals such as sodium and magnesium tend to __ electrons to form cations
  7. 13. the elements in the periodic table is arranged in order of increasing ___ number from left to right across the period