The atomic mass of an element is fractional, because ______________________?
Correct answer: D. It may have isotopes
- A. Of uncertainty principle
- B. It may have isobars
- C. It contains neutrons
- D. It may have isotopes
Explanation
Natural elements usually contain several isotopes with different masses, so their reported atomic mass is a weighted average and may be fractional. Neutrons contribute to mass but do not themselves explain why the average is fractional.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
The size of an atom is of the order of one __________________?
U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about _____________ percent?
Which of the following isotopes is not present in natural uranium?
Radioactive decay is a _____________ change?
The mass number of an element is equal to the number of _____________ in the nucleus?
_____________ have the same mass number, but different nuclear charge ?