5 public questions tagged with this topic.
Lattice energy increases with smaller cation size and higher charge density. BeCl₂ (Be²⁺, smallest) has the highest lattice energy among Be, Mg, Ca, and Sr chlorides.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Nomenclature of Elements with Atomic Number >100
Lattice energy increases with smaller ionic radii (higher charge density). BeF₂ has the highest lattice energy in group 2 due to Be²⁺’s small size, compared to MgF₂, CaF₂, or SrF₂.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
Ionic character increases with larger cation size and lower polarizing power in group 2. BaF₂ (Ba²⁺, largest) has the highest ionic character among BeF₂, MgF₂, CaF₂, and BaF₂.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
Ionic character increases with larger electronegativity difference. F (highest electronegativity, 4.0) forms the most ionic compounds with group 1 elements (e.g., NaF) compared to Cl, Br, or I.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
Hydration energy increases with smaller cation size and higher charge density. Be²⁺ (smallest) has the highest hydration energy among Be, Mg, Ca, and Sr.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Anomalous Properties and Second Period and Chemical Reactivity
