(A) The correct technique is Mass Spectrometry. In this technique,charged atoms (ions) are accelerated by an electric field and then deflected by a ma

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The acceleration of charged atoms by an electric field and their subsequent deflection by a variable magnetic field

(A) The correct technique is Mass Spectrometry. In this technique,charged atoms (ions) are accelerated by an electric field and then deflected by a magnetic field. The extent of deflection depends on the mass-to-charge ratio $(m/z)$ of the ions,which allows for the determination of the masses of isotopes. Therefore,option $A$ is correct.

Class 11 Chemistry Structure of Atom Atomic number, Mass number, Atomic species

Medium

To determine the masses of the isotopes of an element,which of the following techniques is useful?

A
The acceleration of charged atoms by an electric field and their subsequent deflection by a variable magnetic field
B
The spectroscopic examination of the light emitted by vaporised elements subjected to electric discharge
C
The photographing of the diffraction patterns which arise when $X$-rays are passed through crystals
D
The bombardment of metal foil with alpha particles