Question

1.
Define the atomic mass unit.
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Answer 1

An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12. The mass of any isotope of any element is expressed in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu. An atom of sulfur-32 has a mass of 31.972 amu.

Answer 2

Answer:

1 atomic Mass Unit is a mass unit equal to exactly 1/12th of the mass of 1 atom of Carbon-12 (According to UPSE System)