If the mass number of 'A' is 230, then what is the mass number of 'H'? — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Mass number changes solely due to $\alpha$-decay (each reduces it by 4). The series has 4 $\alpha$-decays. Net mass change is $-4 \times 4 = -16$. Mass number of H $= 230 - 16 = 214$. Therefore, correct answer is B.