Chemistry - Mass Number, Atomic Number - Displaying in Word

I'm starting to do Chemistry again, and I was wondering what was the best way to display both the mass number and atomic number in the same character placeholder. i.e. having mass number superscript and atomic subscript.

I would like to know how to do it in microsoft word :D

Code:

---

12
  C
6

---

any ideas?

CTRL "+" and CTRL SHIFT "+" give you sub/super script
or you could try the equation editor

but I still can't get the numbers on top of each other in one line :o

don't worry, i just used the equation editor.