Is this nuclear reaction exothermic or endothermic?

[dav1d]

Is this nuclear reaction exothermic or endothermic??

Homework Statement

Is this nuclear reaction exothermic or endothermic??
alpha particle + beryllium -> carbon12 + neutron

Homework Equations

The Attempt at a Solution

Im not quiet sure which one it is, I don't know what equations to use. Any help would be appreciated.

 

[Spinnor]

First write down the masses of the four nuclei, see

http://www.chem.uAlberta.ca/~massspec/atomic_mass_abund.pdf

If the mass on the left is greater then the mass on the right then the missing energy might be in the form of energy?

 

[dav1d]

I got exothermic, is it correct?