To complete the puzzle, you must know things about the periodic table. First, I will list the symbols of the elements. Then, you will have to find out what element it is, then you'll have to figure out the rest. Simple enough.
Here's the puzzle:
N 42.Ca[2*He][2*Ta] W 71.Ne[Be-1]BrH
You can check your answers for this puzzle on GeoChecker.com.