They provide a place for marine life to flourish, that would otherwise most-likely go extinct because of the constant decrease of natural reefs in our oceans.
Because the pot isn’t water it just gets really hot and you can burn yourself if you touch it
If it has a positive charge it is a cation if negative it is an anion .
I attached a chart that will help you know the charges of the elements
If it is not an isotope then it has around 21 neutrons