MathJax superscript

Question

How can I make this image:

Result with MathJax

{}_{88}^{226}\mathrm{Ra},\;{}_6^{12}\mathrm C,\;{}_{14}^{30}\mathrm{Si},\;{}_{92}^{235}\mathrm U

Answer 1

Subscripts and superscripts are aligned to the left.

If centering them is enough for you, then you can use smallmatrix:

<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-MML-AM_CHTML"></script>
$$
\begin{smallmatrix}
  112 \\
  4
\end{smallmatrix}
\mathrm{Ra}
$$

But if you want them aligned to the right, I think your only option is using array, but then the numbers appear too separated.

<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-MML-AM_CHTML"></script>
$$
{
  \scriptsize
  \begin{array}{r}
    112 \\
    4
  \end{array}
}
\mathrm{Ra}
$$