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:

  1. 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.


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