When `._90 Th^228` transforms to `._83 Bi^212`, then the number of the emitted `alpha-`and `beta-`particle is, respectively.

Thorium isotope ._(90)Th^(232) emits some alpha -particle and some beta -particle and gets transformed into lead isotope ._(82)Pb^(200) . Find the number of alpha -and beta -particles emitted.

In a radioactive decay chain, ._(90)^(232)Th nucleus decays to ._(82)^(212)Pb nucleus. Let N_(alpha) and N_(beta) be the number of alpha and beta - particles, respectively, emitted in this decay process. Which of the following statements is (are) true ?

The end product of decay of ""_(90)Th^(232) is ""_(82)Pb^(208) . The number of alpha and beta particles emitted are respectively

The end product of the decay of ""_(90)Th^(232) is ""_(82)Pb^(208) . The number of alpha and beta particles emitted are respectively ...............

._(90)Th^(232) to ._(82)Pb^(208) . The number of alpha and beta-"particles" emitted during the above reaction is

._(90)Th^(232) to ._(82)Pb^(208) . The number of alpha and beta-"particles" emitted during the above reaction is

A radioactive element ._90 X^238 decay into ._83 Y^222 . The number of beta- particles emitted are.