\(Eu\) (\( Z = 63\)), \(Gd\) (\( Z = 64\)) અને \(Tb\) (\( Z = 65\)) ની ઇલેક્ટ્રોન રચના જણાવો.

A \([Xe]4f^6\,5d^1\,6s^2,\) \([Xe]4f^7\,5d^1\,6s^2\) and \([Xe]4f^8\,5d^1\,6s^2\)
B \([Xe]\,4f^7\,6s^2\), \([Xe]\,4f^7\, 5d^1\, 6s^2\) and \( [Xe]\,4f^9 \,6s^2\)
C \([Xe]\,4f^7 \,6s^2\), \([Xe]\,4f^8\, 6s^2\) and \([Xe]\,4f^8 \,5d^1\, 6s^2\)
D \([Xe]\,4f^6\, 5d^1 \,6s^2,\) \( [Xe]\,4f^7\, 5d^1 \,6s^2\) and \([Xe]\,4f^9 \,6s^2\)

Verified Solution

Answer & Solution

Correct Answer

(B) \([Xe]\,4f^7\,6s^2\), \([Xe]\,4f^7\, 5d^1\, 6s^2\) and \( [Xe]\,4f^9 \,6s^2\)

Step-by-step Solution

Detailed explanation

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.

Same subject

પ્રક્રિયા સાથે ઉદીપક જોડો,

ઉદીપક	પ્રક્રિયા
\((i) \;\mathrm{Na}_{2} \mathrm{O}\)	\((a)\) ઇથાઈન માથી ઇથેનાલમાં ઓક્સિડેશન
\((ii) \;\mathrm{TiCl}_{4}+ \mathrm{Al(CH_3)}_{3}\)	\((b)\) આલ્કાઇન્સનું બહુલીકરણ
\((iii)\;\mathrm{PdCl_2} \)	\((c)\) \(H_2SO_4\)ની બનાવટમાં \(SO_2\)ના ઓક્સિડેશનમાં
\((iv)\;\) નિકલ સંકીર્ણો	\((d)\) ઇથિલીનનું બહુલીકરણ

નીચેના પૈકી કયો વિકલ્પ સાચો છે?

NEET 2019 Hard

Explore more questions on app

From NEET

Explore more questions on app