Chemistry
Grade-9
Easy

Question

How much part of mass of carbon C-12 atom is in one unit of atomic mass?

  1. 1 over 12
  2. 1 over 13
  3. 1 over 16
  4. 1 fourth

hintHint:

1 Da is defined as 1/12 of the mass of a free carbon-12 atom.

The correct answer is: 1 over 12


    • Atomic mass of Carbon is 12 g.
    • 1 Da is defined as 1/12 of the mass of a free carbon-12 atom.
    • Hence, 1/12 part of mass of carbon C-12 atom is in one unit of atomic mass.

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