My Chemistry Puzzle

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Across
  1. 1. the elements of Group 18 of the periodic table
  2. 6. the physical and chemical properties of the elements are periodic functions of their atomic numbers.
  3. 7. the d-block elements are metals with typical metallic properties and are often referred to as
  4. 9. the 14 elements with atomic numbers from 90 (thorium, Th) to 103 (lawrencium, Lr).
  5. 10. the 14 elements with atomic numbers from 58 (cerium, Ce) to 71 (lutetium, Lu).
Down
  1. 2. the elements of Group 1 of the periodic table
  2. 3. the elements of Group 2 of the periodic table
  3. 4. an arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group.
  4. 5. the elements of Group 17 of the periodic table
  5. 8. element 90