ChemMatters Puzzle: An Element Fill-In Puzzle

This puzzle will test your knowledge of the elements and their symbols, as well as the topics of energy and thermodynamics.

Below, you will see 12 familiar terms. They are not anagrams but do have a few letters missing. Your task is to fill in those spots. The missing letters will be symbols of an element (but are not case sensitive). We will give you the names of all the elements used today at the bottom of this page.

Be warned that elements up to atomic number 110 might be in play, so have a relatively new periodic table handy. As a solving aid, any missing symbol will be used just once (with one exception). Note that there are 14 elements with just one letter in their symbol. Three blanks in a row could contain three different symbols with one letter each, or they could contain one symbol with two letters and one symbol with one letter.

For example, if you are given E _ _ R G _, the missing letters are NE and Y, yielding E N E RG Y. Neon and Yttrium could then be crossed off the list of names. Note how the second letter of Ne is written in upper-case, which is fine.

Good luck with your element hunt!

1. EN T R _ _ Y

2. W_ _T

3. K_ _ E _ _C

4 F_ _E E _ _ _ _ Y (two words)

5 _ -JO_LE (hyphenated)

6. KE L _ _ N

7. _ _LORIE

8. PHA_ _

9. TH_ _ _ _ (slang)

10. E_ _ O_ _ E R M I C

11. C _ _ O R _ ME_ _R

12 . V O L _ _ _ _

Here are the names of the elements in use, in alphabetical order:

Aluminum Astatine Calcium Erbium Iodine

Indium Iodine Germanium Potassium Molybdenum

Neodymium Neon Oxygen Phosphorous Rhenium

Roentgenium Selenium Tantalum Tellurium Thorium

Titanium Uranium Vanadium

Answers to the ChemMatters Puzzle

Term Missing Letters

1. ENTROPY O, P

2. WATT At

3 KINETIC In, Ti

4. FREE ENERGY Re, Ne, Rg

5. K-JOULE K, U

6. KELVIN V, I

7. CALORIE Ca

8. PHASE Se

9. THERMO Er, Mo

10. ENDOTHERMIC Nd, Th

11.CALORIMETER Al, I, Te

12. VOLTAGE Ta, Ge