Two new unstable isotopes of an element are discovered:

Isotope X which decays exponentially in nature with a half-life of 0.25 seconds;

Isotope Y which decays exponentially with a half-life of 0.5 seconds.

We set up a Petri dish with twice as many isotopes X as isotopes Y and then let them decay. Can we expect the quantity of isotopes X to remain larger than the quantity of isotopes Y in the long run? Why?