The given reaction is a nuclear reaction hat involves the emission of helium nucleus
- The missing box would be the number 86
- The reaction is a form of alpha decay
Reason:
First part:
The given nuclear reaction is presented as follows;
[tex]\dfrac{225}{88} Ra \longrightarrow \dfrac{4}{2} He + \dfrac{222}{[\ ]} Rn[/tex]
The value for the missing box; Required
Solution:
Let x represent the number in the missing box
Where the protons are conserved, the atomic number of the reactants and product are equal
Therefore, we have;
88 = 2 + x
∴ x = 88 - 2 = 86
x = 86
The missing box would be the number 86
Second part:
The nuclear reaction involves the emission of an helium nucleus from radium, Ra, to form a radon, Rn
The emission of an Helium nucleus (alpha particle) is a form of alpha decay
Learn more here:
https://brainly.com/question/17438493
