Hidden elements puzzle

large heat-sensitive periodic tables showing an imprint of a human hand.Enter your students’ correct solutions into a draw on or before January 10, 2020. The prize is a pack of 30 Large Heat-Sensitive Periodic Tables donated by Educational Innovations (www.teachersource.com). Please have your students print their full name clearly, and send your students’ solutions to: Chem 13 News, Hidden elements puzzle, Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1; or email kjackson@uwaterloo.ca, along with your school’s complete mailing address. Prizes are for Canada and United States submissions only. Printable version hidden elements puzzle (PDF).

You can start in any square in a grid and can move either horizontally, vertically or diagonally to any neighboring square, but no square may be reused when finding an individual element.

For example, the element platinum can be found in the following grid by starting at the P and then following the letters that are bolded:

Example grid
  Column 1 Column 2 Column 3 Column 4 Column 5
Row 1 L A S G M
Row 2 P F T U I
Row 3 O I N F E

There are nineteen different elements hidden in this grid below. Searching carefully, can you find all of them?

Hidden elements puzzle
  Column 1 Column 2 Column 3 Column 4 Column 5 Column 6 Column 7
Row 1 L R S V L H T
Row 2 A L E C A I U
Row 3 P S A N T L S
Row 4 T R O D I H E
Row 5 U G L R Z U M

The nineteen elements are:

  1.  __________________________          11.  __________________________
  2.  __________________________          12.  __________________________
  3.  __________________________          13.  __________________________
  4.  __________________________          14.  __________________________
  5.  __________________________          15.  __________________________
  6.  __________________________          16.  __________________________
  7.  __________________________          17.  __________________________
  8.  __________________________          18.  __________________________
  9. ___________________________          19.  __________________________
  10. ___________________________