Nuclei - Result Question 8

8. The mass number of a nucleus is

[2003]

(a) sometimes less than and sometimes more than its atomic number

(b) always less than its atomic number

(c) always more than its atomic number

(d) sometimes equal to its atomic number

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Answer:

Correct Answer: 8. (d)

Solution:

  1. (d) In case of hydrogen atom,

Mass number $=$ atomic number