A Neat Trick

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The curly brackets are normally used for nuclear chemistry but they can also be used to create some "bizarre" equations that FX Chem will refuse to format automatically.


For example, if you want to write




FX Chem will not be happy.  It obviously does not "know" Na2+ and will not produce it.


Unfortunately, that is exactly the strange sort of thing a chemistry teacher will need to write sometimes - to test a student's knowledge.


You can actually create this strange ion by typing




FX Chem will treat the 2+ as the mass number of an element and put the 2+ where you want it.  This trick allows you to force things to be superscript even if FX Chem does not agree with you.


Similarly, you can use the curly brackets to force things into subscript.


na{ ,2+}


The comma tells FX Chem that the mass number is finished and the atomic number is beginning and the 2+ will be subscripted