formula's with 2 caracter variables

[TopQ]

Dear Salvomic

Thank you for your gesture, but Double variables like Mn, Si, etc are giving a sytaxerror. I can change Mn to M and Si to S, But will get problems with C an Cu.

I tried to use a spreadsheet instaid, but as soon I type Si in a cell the complete HP connection program on my PC shuts down due to an error.

Is there a simple way to type a formula and get a list of variables to fill in, or do I have to make a program for it?