Based on the calculations, the chemical element (X) in this nuclear equation is equal to ²³⁵U₉₂.
<h3>What is an alpha decay?</h3>
An alpha decay refers to a type of nuclear reaction in which the atomic nucleus of a radioactive element emits an alpha particle (atom of helium), thereby, producing chemical elements with a different atomic nucleus.
In this exercise, we are given the following nuclear equation with an alpha decay:
²³⁹Pu₉₄ -----> X + ⁴He₂
For the superscript, we have:
239 - 4 = 235.
For the subscript, we have:
94 - 2 = 92.
Therefore, the chemical element (X) is equal to ²³⁵U₉₂.
Read more on alpha decay here: brainly.com/question/23303931
