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What is Gram Atomic Mass? Give example.

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The atomic mass of an element expressed in grams is called gram atomic mass of that element. 


It is also defined as mass of 6.022 x 1023 atoms.


It is also defined as the mass of one mole atoms. 

For Example for oxygen atom:

Atomic mass of ‘O’ atom = mass of one ‘O’ atom = 16 amu 

Gram atomic mass = mass of 6.022 × 1023 ‘O’ atoms 

= 16 amu x 6.022 × 1023 = 16 x 1.66 × 10-24 x 6.022 x 1023 = 16 gm/mole


1.66 x 10-24 x 6.022 x 1023 = 1

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