# Are there any special packages enabled for MathJax?

I usually hang out at ChemistrySE, where I use \ce{} to format chemical equations. I once tried to use \ce{} here to write a nuclear reaction, and was perplexed when it didn't work. Someone told me that mhchem isn't enabled here. I ended up having to use \text{} instead.

So, are there any special packages for MathJax here? Or is it just plain old MathJax just like how it's at MathSE?

• relevant: Enabling mhchem?. – AccidentalFourierTransform Aug 20 '17 at 16:02
• From AccidentalFourierTransform's link: "You can, of course, use \require{mhchem} in order to load mhchem as a one-off for the answer you are writing. E.g., $\require{mhchem} \ce{H20}$. You only need to use \require{mhchem} once on the page." – heather Aug 20 '17 at 16:11
• @heather This is good. I'll try this out now. – Pritt Balagopal Aug 20 '17 at 16:35