STANDARDChemistry-Nuclear Chemistry
STANDARD Chemistry Radioactive Decay MCQ Question
Type: MCQ-conceptual-Medium
A radioactive nucleus decay as follows :- X → X₁ → X₂ → X₃ → X₄ If the atomic number and the mass number of X are 72 and 180 then the mass number and atomic number of X₄ are :-
A
172, 70
B
171, 69
C
172, 69
D
172, 68
Correct Answer
Option B
Detailed Explanation
As we know, mass and charge of α = 4 and +2, β = 0 and -1, γ = 0 and 0. So X → X₁ → X₂ → X₃ → X₄ results in m = 180, 176, 172, 172 and e = 72, 70, 71, 69, 69. So mass and charge of X₄ is 172 & 69.
Found an issue with this question?