Reply To: Chemistry/physics symbol Home › Forums › Nemeth Code for Math and Science › Chemistry/physics symbol › Reply To: Chemistry/physics symbol July 14, 2010 at 8:31 pm #20399 Chris ClemensKeymaster If you don't have the (Green) Nemeth Code Book the dots for this are 456, 123456.You would put a space before and after the variation symbol.Hope this helps.