A nucleus undergoes two beta-minus decays and one alpha decay, in an unknown order. Which conclusion can be made about the final nucleus?
It is a different isotope of the original element, with four fewer nucleons.
It is a different isotope of the original element, with two fewer nucleons.
It is an isotope of a different element, with four fewer nucleons.
It is an isotope of a different element, with two fewer nucleons.