Difference between superscripted n subscripted?

Answer 1

superscripted text appears higher (and usually smaller) like the footnotes over at Wikipedia (or any paper) and subscripted text appears lower (also usually smaller) as you had to learn it in Chemistry for CH4 (for example).

Answer 2

Oooo. I got it. ty@Lennard Brandkamp

Answer 3

try this:
<p>x_{<small>2</small>}</p>
<p>x^{<small>2</small>}</p>

Answer 4

@Seyhan Özen thanks mannn