PERIODIC TABLE CROSSWORD

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Across
  1. 2. The lightest metal in Group I, used in batteries.
  2. 5. Vertical columns in the periodic table are called ___.
  3. 7. Elements that exist as molecules of two atoms are called ___.
  4. 8. A charged particle formed when an atom gains or loses electrons is an __
  5. 10. Group VII elements are called ___.
  6. 12. Group 1 elements form ___ solutions when reacting with water.
  7. 13. Atoms are ___ when they have no charge.
  8. 15. Group II elements are called ___ earth metals.
  9. 18. The number of electrons in the outer shell is called ___ electrons.
  10. 19. Atomic ___ refers to the size of an atom.
  11. 21. Group 8 elements are known as ___ gases.
  12. 24. Group I elements ___ one electron to become stable.
  13. 26. The arrangement of electrons in energy levels is called electron ___.
  14. 27. Noble gases are very ___ due to full outer shells.
  15. 28. A halogen used as an antiseptic to clean wounds.
  16. 29. Atomic number is equal to the number of ___.
Down
  1. 1. Group 7 elements tend to ___ electrons in reactions.
  2. 3. Elements that rarely form compounds are ___.
  3. 4. A Group II element important for bones and teeth.
  4. 6. Group 7 elements are classified as ___.
  5. 9. Group I elements are called ___ metals.
  6. 11. An anion has a ___ charge.
  7. 13. A noble gas used in bright advertising lights.
  8. 14. Alkali metals are highly ___ with water.
  9. 16. The most reactive element in Group 7 is ___.
  10. 17. Elements in Group 1 belong to the ___ category of the periodic table.
  11. 20. Two or more atoms bonded together form a ___.
  12. 22. Ions are formed by gaining or losing ___.
  13. 23. Horizontal rows in the periodic table are called ___.
  14. 25. A cation has a ___ charge.