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Atomic Mass Unit : Class 9 Science MCQ Practice Questions & Answers (Bengali) - ObjectiveMcq

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PracticeClass 9 ScienceChemistryAtomic StructureAtomic Mass Unit

Atomic Mass Unit in Class 9 Science : Practice MCQ Questions & Answers with Explanations

1 practice sets · Page 1 of 1

Class 9 ScienceMediumChemistry Atomic StructureAtomic Mass Unit

1.

What is the atomic mass unit (amu) based on?

A

Mass of carbon-12 isotope

B

Mass of a proton

C

Mass of a neutron

D

Mass of an electron

Correct Answer:

A — Mass of carbon-12 isotope

Explanation:

One atomic mass unit is defined as one-twelfth the mass of a carbon-12 atom.