This chapter covers the structure, properties, and chemical behavior of transition and inner transition elements. It is a core topic in school and undergraduate chemistry, essential for Class 12 students, competitive exam aspirants, and undergraduate learners, forming the foundation for understanding metallic chemistry, complex formation, and redox behavior.
In this section, you will study:
General characteristics of d-block (transition) elements
Electronic configuration, oxidation states, and trends in properties
Magnetic properties, color, and catalytic activity of transition metals
Formation and properties of coordination compounds
Chemistry of f-block (lanthanides and actinides)
Comparison of d- and f-block elements in terms of reactivity and stability
NCERT-aligned explanations, diagrams, MCQs, and exam-oriented questions
The content is structured to build conceptual clarity, improve analytical reasoning, and prepare students for school examinations, NEET, JEE, and undergraduate assessments.
Develop a strong foundation in transition and inner transition element chemistry to understand their structure, bonding, and unique chemical behavior.
Q. What is the geometry of the complex ion [Cu(NH3)4]SO4?
A.
Tetrahedral
B.
Square planar
C.
Octahedral
D.
Trigonal bipyramidal
Solution
The geometry of [Cu(NH3)4]2+ is square planar due to the presence of a d9 configuration in copper.
Q. What is the oxidation state of iron in the complex [Fe(CN)6]3-?
A.
+2
B.
+3
C.
+4
D.
+1
Solution
In the complex [Fe(CN)6]3-, each cyanide (CN) has a charge of -1. Therefore, to balance the overall charge of -3, iron must be in the +3 oxidation state.
