Atomic Mass Unit: It is defined as the mass unit equal to exactly 1/12th of the mass of one atom of C- 12 isotope. Earlier, it was abbreviated as amu but according to latest recommendations of IUPAC, it is now written as ‘u’— unified mass.
Note : Atoms of most of the elements are not able to exist independently. Atoms form molecules and ions. These molecules or ions aggregate in large numbers to form the matter that we can see, feel or touch.
Examples of values expressed in Atomic Mass Units:
What is the full form of "u" according to IUPAC? | |||
Right Option : C | |||
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Which of the following is the atomic mass (amu) of Uranium isotope? | |||
Right Option : B | |||
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Which of the following are correct : (a) A hydrogen-1 atom has a mass of 1.007 u (or Da or amu). (b) A carbon-12 atom is defined as having a mass of 12 u. (c) The largest known protein, titin, has a mass of Da. | |||
Right Option : D | |||
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