Answer:
¹³₆C
Step-by-step explanation:
The given nuclear reaction is:
¹⁰₅B + ₂⁴He → ᵃₙX + ₁¹H
In balancing nuclear reaction equation, the mass number which are the superscript and atomic number, the subscript on both sides of the equation must be the same.
For the mass number:
10 + 4 = a + 1
14 = a + 1
a = 13
For the atomic number:
5 + 2 = n + 1
7 = n + 1
n = 6
Note: n is the same as z from the equation
therefore our atom is ¹³₆X which is an isotope of carbon, ¹³₆C