Q21 of 44 Page 8

Name the device used for measuring the mass of atoms and molecules.

Mass spectrometer is used for measuring the mass of atoms and molecules.


The method used for measuring the mass is known as mass spectrometry.



Fig 1. Mass Spectrometer


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Why do we have different units for the same physical quantity?

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The radius of atom is of the order of 1 Å and radius of nucleus is of the order of Fermi. How many magnitudes higher is the volume of atom as compared to the volume of nucleus?

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Express unified atomic mass unit in kg.

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. A function F(θ) is defined as

F (θ) = 1 – θ + - +


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