When I type the following formula in LaTeX
$\ce{^{4}He + \gamma \rightarrow {2}p^{+} + 2n}$
I get a very weird space between the 2
and n
in the last term, but there isn't any between the second last term.
But when I added a bracket on the 2
in the last term, the horizontal space disappeared:
$\ce{^{4}He + \gamma \rightarrow {2}p^{+} + {2}n}$
Is this the proper way to eliminate the space? Or should I just leave it with the original form?