This is worth an extra thread.
The website IUPAC Periodic Table of the Elements and Isotopes for the Education Community from 2018 is well worth a look. It contains everything you never wanted to know about the periodic table and isotopes but have been forced to find out. It’s as much about biology, ecology and geology as it is about chemistry and physics.
Want to know how much deuterium there is in US rivers?
How deuterium is used in forensic science?
How the carbon-14 content of the atmosphere has recovered since the banning of nuclear tests?
What Yuri Organasson looks like?
Beryllium-10 use in geochronology?
Nitrogen-15 as a tracer for fertiliser use?
Sulfur isotopes in early modern humans?
How is Scandium-86 used in oil refinery crackers?
Do you know what Europium-152 has to do with gamma ray spectrometers?
Of course you don’t, but the information is on the website, and a heck of a lot extra.
Fluorine-18 measuring the difference in brain activity between sober and drunk.
Subsea processes.
Zinc isotopes.
Biological elimination of Rubidium from the body of a striped-faced dunnart.

Global distrubution of Iodine-191 as a result of the Chernobyl disaster.