A nucleus mn X emits one α particle and two β- particles. The resulting nucleus is

Question

A nucleus mn X emits one α particle and two β- particles. The resulting nucleus is (A) m-6n-4 Z (B) m-64Z (C) m-4nX (D) m-4n-2 Y

Tardigrade Admin · Accepted Answer

When an alpha particle ( 24 He ) is emitted, the mass number and the atomic number of the daughter nucleus decreases by four and two respectively. When a beta particle ( β -) is emitted, the atomic number of the daughter nucleus increases by one but the mass number remains the same. ∴ nm X xrightarrowα n-2m-4 Y xrightarrow2 β- nm-4 X

Q. A nucleus $_{n}^{m} X$ emits one $α$ particle and two $β^{-}$ particles. The resulting nucleus is

$_{n - 4}^{m - 6} Z$

$_{4}^{m - 6} Z$

$_{n}^{m - 4} X$

$_{n - 2}^{m - 4} Y$

Q. A nucleus nm​X emits one α particle and two β− particles. The resulting nucleus is

n−4m−6​Z

4m−6​Z

nm−4​X

n−2m−4​Y

Q. A nucleus $_{n}^{m} X$ emits one $α$ particle and two $β^{-}$ particles. The resulting nucleus is

$_{n - 4}^{m - 6} Z$

$_{4}^{m - 6} Z$

$_{n}^{m - 4} X$

$_{n - 2}^{m - 4} Y$