Atomic Structure - Result Question 71
####47. An isotone of ${ } _{32}^{76} Ge$ is
(a) ${ } _{32}^{77} Ge$
(c) ${ } _{34}^{77} Se$
(b) ${ } _{33}^{77} As$
(d) ${ } _{34}^{78} Se$
$(1984,1 M)$
Assertion and Reason
Read the following questions and answer as per the direction given below :
(a) Both Statement I and Statement II are correct; Statement II is the correct explanation of Statement I
(b) Both Statement I and Statement II are correct; Statement II is not the correct explanation of Statement I
(c) Statement I is correct; Statement II is incorrect
(d) Statement I is incorrect; Statement II is correct
Show Answer
Answer:
Correct Answer: 47. $(a, b, c)$
Solution:
- Isotones have same number of neutrons. ${ } _{32} Ge^{76},{ } _{33} As^{77}$ and ${ } _{34} Se^{78}$ have same number (44) of neutrons, hence they are isotones.
