Question

define atomic mass unit

Answer 1

Hi friend....



A unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12 is known as atomic mass unit.



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Answer 2

ATOMIC MASS UNIT

• The dalton or unified atomic mass unit whose symbols are Da or u is a non-SI unit of mass broadly used in physics and chemistry.
• It is interpreted as 1⁄12 of the mass of an unbound neutral atom of carbon-12 which prevails in its nuclear and electronic ground state and at rest.
• The atomic mass constant which is denoted as amu is distinguished identically, providing 1 amu or 1 u =121 th of the mass of an atom of carbon -12.
• An atomic mass unit is formulated as accurately 1/12 the mass of a carbon-12 atom.
• The carbon-12 atom possesses six neutrons and six protons in its nucleus.
• It is exemplified as a.m.u or u (unified).
• It is a unit of mass which is used to express atomic masses.
• 1a.m.u is the norm of the proton rest mass and the neutron rest mass.

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