Science competition

For each reaction, write a correct, balanced equation. Then take the first letter of the symbol of each chemical product. These letters will form a message that is the result of when high school science courses compete with one another. The letters are in order but if there is more than one product in the reaction, you may have to rearrange the order of the products to get a meaningful solution.

Periodic table of the elements with photos for each element.

  1. Methane undergoes complete combustion.
  2. Californium-253 emits a beta particle.
  3. Indium trichloride reacts with magnesium nitrate.
  4. When heated, titanium(IV) sulfide releases sulfur, forming titanium(III) sulfide.
  5. Yttrium nitrate reacts with rubidium hydroxide.
  6. Tungsten(II) iodide reacts with chlorine.
  7. Tin(II) fluoride reacts with sodium phosphate.

Enter your students’ correct solutions into a draw on or before June 30, 2016. The prize is a 3D Lenticular Periodic Table (see page 19 for color photo) donated by Educational Innovations. A prize will be awarded to both student and teacher. Go to for more information about this prize. Send your students’ solutions to: Chem 13 News, Science Competition Puzzle, Department of Chemistry, University of Waterloo, Waterloo ON  N2L 3G1, Canada; or email: