1.

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

Answer»

The acceleration of charged atoms by an ELECTRIC field and their subsequent deflection by a variable magnetic field
The spectroscopic examination of the light emitted by vaporised elements subjected to electric discharge
The photographing of the diffraction PATTERNS which arise when X-rays are PASSED through crystals
The BOMBARDMENT of metal foil with alpha particles

Solution :It is the required TECHNIQUE


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