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.
The series officially premiered on July 17, 1999. It has received worldwide critical acclaim since its premiere and gained enormous popularity by its second season. A feature film, The SpongeBob SquarePants Movie, was released in theaters on November 19, 2004, and a sequel was released on February 6, 2015.
On November 18, 2004, Spike TV (and sister channel VH1) aired a night-long marathon of reruns of the Nickelodeon animated series SpongeBob SquarePants starting at midnight, to promote the following day's release of The SpongeBob SquarePants Movie in theaters.