6 public questions tagged with this topic.
For isoelectronic species (10 electrons), ionic radius decreases with increasing nuclear charge. Al³⁺ (Z=13) has the lowest radius compared to Na+, Mg²⁺, or F⁻.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
For isoelectronic species (36 electrons), lattice energy increases with charge. Sc³⁺ (Z=21, +3) forms ScF₃ with the highest lattice energy compared to K+, Ca²⁺, or Br⁻.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
For isoelectronic species (18 electrons), polarizing power increases with charge and decreases with size. Sc³⁺ (Z=21, +3) has the highest polarizing power compared to K+, Ca²⁺, or Cl⁻.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
For isoelectronic species (36 electrons), radius increases with decreasing nuclear charge. Br⁻ (Z=35) has the largest radius compared to K+, Ca²⁺, or Sc³⁺.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
K⁺ has 18 electrons.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Quantum Numbers - Principal Azimuthal Magnetic Spin
Na⁺ has 10 electrons. Mg²⁺ also has 10.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Developments Leading to Bohr Model - Electromagnetic Radiation and Spectrum
