Question

The alpha decay of a radioactive nuclide (X) emits a He-4 nucleus and produces an isotope of Superscript 235 subscript 92 upper U.. What is X?

Answer 1

the answer is D on edge

Step-by-step explanation:

Answer 2

Answer: Thus X is Plutonium

Step-by-step explanation:

Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units and atomic number is reduced by 2 units.

General representation of alpha decay :

`_(Z)^(A)\textrm{X}\rightarrow _(Z-2)^(A-4)\textrm{Y}+_2^4\textrm{He}`

where Z = atomic number

A= mass number

X and Y = atomic symbol of elements

`_(Z)^(A)\textrm{X}\rightarrow _(92)^(235)\textrm{U}+_2^4\textrm{He}`

Thus
`_(94)^(239)\textrm{Pu}\rightarrow _(92)^(235)\textrm{U}+_2^4\textrm{He}`

Thus X is Plutonium with atomic number 94 and mass number 239