Isoelectronic Species and d-Electron Count
Identify isoelectronic ions and determine the number of d-electrons in transition metal ions.
Why this shows up in the exam
You may be asked to compare species based on electron count and configuration.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
Which of the following pairs has the same dⁿ configuration?
More from The d- and f-Block Elements
Oxidation States and Redox Behavior
Study the variable oxidation states of d- and f-block elements, their stability, and how these relate to redox reactions and electrode potentials.
Redox Reactions of Permanganate and Dichromate
Master the redox reactions, stoichiometry, and n-factor calculations involving KMnO₄ and K₂Cr₂O₇ in different media.
Definition and Electronic Configuration of d- and f-Block Elements
Learn what transition (d-block) and inner transition (f-block) elements are, their position in the periodic table, and how to write their electronic configurations, including for ions.
Magnetic Properties of d- and f-Block Elements
Understand how to calculate and compare magnetic moments, relate them to unpaired electrons, and distinguish between paramagnetic, diamagnetic, and ferromagnetic behavior.
Properties and Oxidation States of Lanthanoids and Actinoids
Explore the electronic configurations, oxidation states, magnetic and spectral properties, and chemical behavior of lanthanoids and actinoids.
Colour of Transition and Inner Transition Metal Ions
Learn why d- and f-block ions and complexes are colored, focusing on d-d and f-f transitions and the role of electronic configuration.