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General electronic configuration of lanthanides is
Options
(a) (n – 2) f¹⁻¹⁴ (n – 1) s²p⁶d⁰⁻¹ ns²
(b) (n – 2) f¹⁰⁻¹⁴ (n – 1) d⁰⁻¹ ns²
(c) (n – 2)f⁰⁻¹⁴ (n – 1)d¹⁰ ns²
(d) (n – 2) d⁰⁻¹ (n -I) f ¹⁻¹⁴ ns²
Correct Answer:
(n – 2) f¹⁻¹⁴ (n – 1) s²p⁶d⁰⁻¹ ns²
Explanation:
Lanthanides undergo Aufbau’s principle. The principle states that the electrons should be filled in the ground state first, next the excited state will be filled, so have lanthanide comes under F-block elements, Here 14 electrons can be filled from lowest energy levels to highest energy level. The general electronic configuration is (n-2) f⁽¹⁻¹⁴⁾ (n-1) s²p⁶d⁰⁻¹ n s².
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Topics: D and F Block Elements
(91)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If 0.2 gram of an organic compound containing carbon, hydrogen and oxygen
- Bleaching powder is obtained by treating Cl₂ with
- Ferrocene is an example of
- Which is weakest acid
- The coordination number of an atom in the simple cubic unit cell in a crystal lattice
Topics: D and F Block Elements (91)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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According to Aufbau principal, firstly electrons must be filled in lower energy level. Lanthanides have electronic configuration [Xe] 4f^0-14 5d^0-1 6s^2
Energy order is 6s<4f~5d