Google Forms are great for collecting student responses to questions in real time. And they are easy to make from existing worksheets. This is a video I put together to show you how I do this.
Google Form doesn't have a built in editor for adding superscripts and subscripts. This is my workaround.
Here is the link to my subscript/superscript spreadsheet. You can make your own copy to your google drive, and then copy/paste the subscripts/superscripts you need.
I have updated the spreadsheet to include a few more symbols which are useful for chemists (5 August 2020).