4 public questions tagged with this topic.
Ionic conductivity in molten salts increases with smaller cation size due to higher mobility. LiCl has the highest conductivity among Li, Na, K, and Cs chlorides.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
Flame color intensity increases with lower ionization energy, allowing easier electron excitation. Cs (lowest ionization energy) exhibits the highest intensity among Li, Na, K, and Cs.
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
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
Group 1 elements (alkali metals) have one valence electron, with outer configuration ns¹.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Anomalous Properties and Second Period and Chemical Reactivity
