Atomic Structure - Result Question 42

####18. Many elements have non-integral atomic masses, because

(a) they have isotopes

$(1984,1 M)$

(b) their isotopes have non-integral masses

(c) their isotopes have different masses

(d) the constituents, neutrons, protons and electrons, combine to give fractional masses

Match the Columns

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Answer:

Correct Answer: 18. $(a, c)$

Solution:

  1. Many elements have several isotopes. For such elements, atomic mass is average of the atomic masses of different isotopes, which is usually non-integral.


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