How many alpha and eta - particles are emitted ,when uranium nucleus `(_(92)U^(238))` decays to lead`(_(82)Pb^(206))`?

How many alpha - and beta - particles are emitted, when _(92)U^(238) decays to _(90) Th^(230) ?

How many alpha - and beta - particles are emitted, when _(90)Th^(232) decays to _(82)Pb^(208) ?

How many alpha - and beta - particles are emitted, when _(90)Th^(232) decays to _(89)Ac^(228) ?

After a series of alpha and beta decays,plutonium (_(94)Pu^(239)) becomes lead - (_(82)Pb^(207)) . How many alpha and beta particles are emitted in the complete decay scheme?

The alpha particle faces a coulomb barrier .A neutron being uncharged faces no such barrier .Why does the nucleus _(92)U^(238) not decay spontaneously by emitting a neutron?

._(90)Th^(234) disintegrates to give ._(82)Pb^(206)Pb as the final product. How many alpha and beta particles are emitted during this process ?

In a radioactive decay,the nucleus emits an alpha -particle followed by two beta -particles.Show that the final nucleus is an isotope of the original line.

._(83)^(214)Bi decays to A by alpha -emission . A then decays to B by beta emission , which further decays to C by another beta emission . Element C decays to D by still another beta emission , and D deacays by alpha -emission to form a stable isotope E. What is element E? a) _(81)^(207)T1 b) _(80)^(206)Hg c) _(79)^(206)Au d) _(82)^(206)Pb

Under certain circumstances, a nucleus can decay by emitting a particle more massive than an alpha -particle. Consider the following decay processes: "_88^223Ra rarr "_82^209Pb + "_6^14C , "_88^223Ra rarr "_86^219Rn + "_2^4He .Calculate the Q-values for these decays and determine that both are energetically allowed.

Uranium - 234 is radioactive and emits alpha -particles at what appears to be a constant rate.A sample of uranium - 234 of mass 2.64 mu G is found to hae an activity of 604 Bq. Calculate for the sample of Uranium -234 the decay constant