MHT CET · Chemistry · Structure of Atom

Which among the following statement is TRUE about isotones?

A These occupy same positions in the modern periodic table,
B These have different number of neutrons and same number of protons.
C These have same chemical properties,
D The are nuclides having the same number of neutrons but different number of protons and hence different mass numbers.

Verified Solution

Answer & Solution

Correct Answer

(D) The are nuclides having the same number of neutrons but different number of protons and hence different mass numbers.

Step-by-step Solution

Detailed explanation

They are nuclides having same number of neutrons but different mass number

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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