Type Forms 7. Any material carrying a superscript or subscript must be punctuated in the mathemat- ical mode. 7.1 Simultaneous and Non-simultaneous Superscripts and Subscripts . Simultaneous and non-simultaneous subscript and superscript notation must be preserved as it has special significance in chemistry. 7.2 Electron Charge .
Different textbooks use different methods to indicate electron charge.
No matter what method is used in print, only one method should be used in braille. In braille, use the appropriate numeral followed by the charge shown. 7.3 Atomic Numbers and Mass Numbers . Atomic numbers and mass numbers are printed as left superscripts and subscripts. Follow the rules of the Nemeth Code.