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Question
Chemistry
Which of the following are isotones?
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Q. Which of the following are isotones?
Structure of Atom
A
${ }_{18} Ar ^{40}$
44%
B
${ }_{20} Ca ^{42}$
37%
C
${ }_{21} Sc ^{43}$
81%
D
${ }_{21} Sc ^{41}$
30%
Solution:
Isotones:Elements that contain same number of neutrons