Atomic Mass Unit
Atomic Mass Unit
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:
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 | |||
| Right Option : D | |||
| View Explanation | |||
What is the full form of "u" according to IUPAC? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) A carbon-12 atom is defined as having a mass of 12 u. (b) The largest known protein, titin, has a mass of (c) AMU is used to differentiate between elements. | |||
| Right Option : A | |||
| View Explanation | |||
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