GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The recent atomic weight scale is based on-
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1H2
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1H1
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6C12
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8O16
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Explanation:
Detailed explanation-1: -Modern atomic weight scale is based on C12. The standard unit for expressing the mass of atom is amu (atomic mass unit). It is equal to 1/12 of the mass of an atom of carbon-12.
Detailed explanation-2: -Assertion :One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Reason: Carbon-12 isotope is the most abundant isotope of carbon and has been chosen as standard.
Detailed explanation-3: -Carbon-12 is particularly important because it serves as the reference point for determining the atomic masses of all nuclides; the atomic mass is, by definition, precisely 12 daltons. Carbon-12 has six protons, six neutrons, and six electrons. The mass of an atom is its atomic mass.
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