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ce 58 nd 60 tb 65 ho 67
Question:
ચાર અનપેર્ડ ઇલેક્ટ્રોનવાળો લેન્થેનાઇડ આયન છે (આપેલ છે: Ce = 58, Nd = 60, Tb = 65 અને Ho = 67):
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f-ઓર્બિટલમાં 7 ઓર્બિટલ્સ હોય છે, તેથી ઇલેક્ટ્રોન ભરાતી વખતે પહેલા 7 એકલા ભરાય છે.
NEET (UG) - 2026
NEET (UG)
Updated On:
Jun 23, 2026
Ho³⁺
Nd³⁺
Ce³⁺
Tb³⁺
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The Correct Option is
D
Solution and Explanation
Step 1: Understanding the Concept:
લેન્થેનાઇડ આયનોની ઇલેક્ટ્રોન રચના \( 4f^n \) મુજબ હોય છે. અનપેર્ડ ઇલેક્ટ્રોન શોધવા માટે હન્ડ્સના નિયમનો ઉપયોગ થાય છે.
Step 2: Detailed Explanation:
- Ce (58): \( [Xe] 4f^1 5d^1 6s^2 \); \( Ce^{3+} = 4f^1 \) (1 અનપેર્ડ)
- Nd (60): \( [Xe] 4f^4 6s^2 \); \( Nd^{3+} = 4f^3 \) (3 અનપેર્ડ)
- Tb (65): \( [Xe] 4f^9 6s^2 \); \( Tb^{3+} = 4f^8 \). \( 4f^8 \) માં \( 8-7 = 1 \) અયુગ્મિત નથી, પરંતુ \( 4f^8 \) ની રચનામાં 6 અયુગ્મિત હોય છે. \( Nd^{3+} \) માં 3 છે. સાચો આયન \( 4f^4 \) અથવા \( 4f^{10} \) જેવો હોય.
- \( Ho^{3+} = 4f^{10} \) (4 અનપેર્ડ).
Step 3: Final Answer:
\( Ho^{3+} \) (10 ઇલેક્ટ્રોન, અયુગ્મિત ઇલેક્ટ્રોન ગણતરી મુજબ 4).
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