Mass of an isotope
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A MCQ from CIE June 2016, which i cannot reproduce here, gives a mass spectrum showing only ONE isotope of Copper having mass of 63.5 showing 100% abundance.
The question was to prove which mass spectrum would give an Ar of 63.5.
The mass spectrum above would give 63.5 as the correct answer but this was not the answer. Another was the answer which different isotopes having different Whole number masses of isotope.
My question is all isotopes of an element have Whole number masses. We have observaed this so far. So we can eliminate any choice having an isotopic mass in decimal....is this correct?
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Originally posted by hoay:
A MCQ from CIE June 2016, which i cannot reproduce here, gives a mass spectrum showing only ONE isotope of Copper having mass of 63.5 showing 100% abundance.
The question was to prove which mass spectrum would give an Ar of 63.5.
The mass spectrum above would give 63.5 as the correct answer but this was not the answer. Another was the answer which different isotopes having different Whole number masses of isotope.
My question is all isotopes of an element have Whole number masses. We have observaed this so far. So we can eliminate any choice having an isotopic mass in decimal....is this correct?
Correct. The molar mass of any single isotope must be an integer (since there is no such thing as non-integer number of protons or neutrons), only averaged molar masses (ie. taking into consideration the relative abundance of various isotopes) can be non-integers. -
Many thanks to you Sir for ur prompt reply.
Never faced suh a question. God bless you.
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Originally posted by hoay:
Many thanks to you Sir for ur prompt reply.
Never faced suh a question. God bless you.
