TS EAMCET · Chemistry · Structure of Atom

Calculate the number of protons, neutrons and electrons respectively in \({ }_7^{14} \mathrm{~N}^{3-}\).

A \(7,10,7\)
B \(7,7,10\)
C \(10,7,7\)
D \(7,7,7\)

Verified Solution

Answer & Solution

Correct Answer

(B) \(7,7,10\)

Step-by-step Solution

Detailed explanation

\({ }_7^{14} \mathrm{~N}^{3-}\) nitrogen has an atomic number of 7 . So, it has 7 proton. To find the number of neutrons, have to substract the atomic number from the atomic mass. So, atomic mass of nitrogen is 14 . Neutron is- \(14-7=7\). (A.M) (A.N) When an ion has a negative…

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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