What Quantity of Energy Would Be Produced as One Atom $\alpha$

What quantity of energy would be produced as one atom of plutonium-238 undergoes $\alpha$ decay to uranium-234? Round your answer to two significant figures.

A) 6.0 *10^-7 J
B) 2.6 *10^-8 J
C) 7.0 * 10^-10 J
D) 1.1 *10^-12 J
E) 4.9 *10^-12 J