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It's Elementary: Group 7 Crossword Puzzle

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November is a month when people emphasise writing: novels, quizzes, verse, questions and even crosswords. "It's Elementary" is my November 2022 crosswording theme. The first element of Group 7 is relatively abundant, unlike the other members of this family. There is one anagram. Enjoy!
Author: psnz - Diff: Harder

ACROSS

    DOWN

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    • Complete Clue List

      Across
      1. Beginner (4)
      3. ELUSORY TIP about the most important 19D ore (anag., 10)
      10. Group 7 researcher (7)
      11. Radioactive synthetic Group 7 element (#107), named after prominent Danish physicist (7)
      12. Examine (3)
      13. Of no importance or relevance: ____ here nor there (7)
      14. Scientific term: on the back (6)
      16. Weighty scientific volumes (5)
      18. To a very large extent or degree (9)
      21. Males from a Northern Irish province (9)
      24. Silent performer (5)
      26. 1D used as a radioactive ____ in medical tests to study metabolism or other biological processes (6)
      28. Reworked, modified (7)
      30. Keats' ode subject (3)
      31. The ocean floor contains billions of tons of 19D ____ which are mineral concretions (7)
      32. Unpredictable (7)
      33. Put into its proper place, like the Group 7 elements in the Periodic Table (10)
      34. Chances (4)

      Down

      1. Group 7 metal (#43) occurs naturally in minute amounts, first artificially produced element (10)
      2. Group 7 metal (#75), one of the rarest in Earth's crust, used in catalytic compounds (7)
      4. Lanthanide element (#70), discovered near the Swedish village that names it (9)
      5. Spherical (5)
      6. Mark the start of (5,2)
      7. Copy (7)
      8. Majestic trees (4)
      9. Recesses (6)
      15. Useful secondary outputs from a chemical reaction or manufacturing process (10 or 2-8)
      17. Consume (3)
      19. Hard grey metal, discovered long before other Group 7 elements because of its relative abundance (9)
      20. Word with run or jump (3)
      22. Significant advancements (in research, including Group 7 elements) (7)
      23. Be proficient in (5,2)
      24. Sparse, like naturally occurring deposits of most of the Group 7 elements (UK spelling, 6)
      25. Changed, perhaps due to ionising radiation from radioactive elements (7)
      27. Combining form relating to the world's largest country by area (5)
      29. Shape flints by striking, in the United Kingdom (4)