Q:

Most extreme chemicals

I know we eschew "lists" on main, but this is a popular search topic and many good questions and answers address the question, "For characteristic X what is the most extreme chemical?"  E.g.,

Strongest acid
Strongest organic acid
Most dangerous: Is there any substance that's a 4-4-4 on the NFPA diamond?
Densest gas
Densest element
Highest melting point
Greatest range between melting and boiling temperature
Strongest reducing agent
Lowest solubility product constant

The only other good list a quick search turned up was this thread at Sciencemadness.
Can we maintain a list of these here as community wiki?  Alternatively, should we create a most-extreme for these questions?

A:

I never said I am against lists, I only said, they tend to create a lot of work.
A list of extreme chemicals as a collection type Q&A might be a good way to catalogue them and create a tiny little compendium. You can totally go for it and create it on the main site. When you do, make sure you explain in good detail how this works.
Once you complete the template, i.e. the question and the corresponding answer, flag it, so that it can be turned into community wiki and locked as such.

BIG, BIG, BIG $\color{red}{\Huge\mathbf{NO}}$ on the tag though.
It is a meta-tag without any use. Worse, whenever there comes a more extreme chemical along the way, a lot of questions will have to be moved around, retagged... etc. pp. So: NO! I will always kill it with prejudice, immediately. 

I finally also abused MathJax.
Thank you for reading.

