The nuclide 244 Bk (berkelium) decays by producing particles, which capture electrons and form He atoms.

The nuclide ²⁴⁴Bk (berkelium) decays by producing α particles, which capture electrons and form He atoms. Its half-life is 4.4 h. A sample of mass 1.0 mg was placed in a container of volume 1.0 cm³ that was impermeable to α radiation, but there was also a hole of radius 2.0 µm in the wall. What is the pressure of helium at 298 K, inside the container after

(a) 1.0 h,

(b) 10 h?