IUPAC Green Book[3] in that, in terms of its definition [4], pH = âlg a. H. it involves a single ion quantity, the activity of the hydrogen ion, which is immeasurable by any ther-. modynamically valid method and requires a convention for its evaluation.
He began developing SpongeBob SquarePants into a television series in 1996 upon the cancellation of Rocko's Modern Life, and turned to Tom Kenny, who had worked with him on that series, to voice the title character.
The first season of the American animated television series SpongeBob SquarePants, created by former marine biologist and animator Stephen Hillenburg, aired from May 1, 1999 to April 8, 2000, and consisted of 20 episodes.