Ammonium __, Salt, Unstable Compound
This page is the CodyCross answer for the clue below from Amusement Park, Group 202, Puzzle 4 (Jumping Fountains).
Question is: Ammonium __, Salt, Unstable Compound
and the answer is: PHOSPHATE
Word Meaning:
PHOSPHATE — (chemistry) Any salt or ester of phosphoric acid.
Definitions from Wiktionary.