Chemistry Basic Concept
Chemistry Basic Concept
Chemistry Mcqs
Chemistry Mcqs for Test Preparation - PakMcqs.com

Chemistry Mcqs for Test Preparation from Basic to Advance. Chemistry Mcqs are from the different sections of Chemistry Subject. Here you will find Mcqs of Chemistry from Basic to Advance. Which will help you to get higher marks in Chemistry portion of test. These Mcqs are useful for students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test,BPSC Test, PTS ,OTS,GTS,JTS,CTS.

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12 Comments to “Mostly elements have fractional atomic masses because of______________________?”
  1. I think D option is correct
    Because fractional atomic mass is taken as the average mass of the isotopes of elements.

  2. C. atomic masses are average masses of isotopes proportional to their relative abundance

    Each isotope will contribute to the average atomic mass of the element proportionally to its abundance.

  3. The atomic masses of most elements are fractional because they exist as a mixture of isotopes of different masses.

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