Q. An isotone of $\ _{32}^{76}Ge$ is
A) $\ _{32}^{77}Ge$
B) $\ _{33}^{77}As$
C) $\ _{34}^{77}Se$
D) $\ _{36}^{78}Sc$
Explanation
(b)
The isotones are a species which have equal number of neutrons.
No. of neutrons is $\ _{32}^{77}Ge = 77 - 32 = 45$
No. of neutrons in $\ _{33}^{77}As = 77 - 33 = 44$
No. of neutrons $\ _{34}^{77}Se = 77 - 34 = 43$
No. of neutron $\ _{36}^{77}Sc = 76 - 36 = 40$
No. of neutrons in $\ _{32}^{76}Ge = 76 - 32 = 44$
${\therefore\ }_{33}^{77}As$ is isotone of $\ _{32}^{76}Ge$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.