Atomic Structure 1 Question 18
18. Many elements have non-integral atomic masses, because
(a) they have isotopes
$(1984,1 \mathrm{M})$
(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. $(\mathrm{a}, \mathrm{c})$
Solution:
- Many elements have several isotopes. For such elements, atomic mass is average of the atomic masses of different isotopes, which is usually non-integral.
