nuclear chemistry Questions

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three α-particles in succession. The group of the periodic table to which the resulting daughter element would belong is :

${}_{92}^{238}\text{U}$ emits $8$ $\alpha$ -particles and $6$ $\beta$ -particles. The neutron/proton ratio in the product nucleus is:

$\alpha$ -Particles can be detected using: