Isotopes Lesson

William Tsai · 20K views · 2013 · 8:25

Open on YouTube

Biology & biotechnologyother

Why the open web links it

Explains isotopes in terms of protons and neutrons with MCAT-aligned problem-solving.

Linked by 2 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including plos.org, egu.eu.