8 public questions tagged with this topic.
Cerium (Ce) shows +4 state to achieve stable 4f 0 configuration.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Actinoids and Comparison of Lanthanoids and Actinoids
Cerium (Ce) shows +4 state to achieve stable 4f 0 configuration (like Xenon).
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Actinoids and Comparison of Lanthanoids and Actinoids
Sodium (Na) in Group 1 has [Ne] 3s¹ . Losing 1 electron forms Na⁺ with [Ne] , a noble gas configuration.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: VSEPR Theory and Shapes of Molecules
Oxygen (O) has 1s² 2s² 2p⁴ . Gaining 2 electrons forms O²⁻ with 1s² 2s² 2p⁶ , matching Ne .
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Kossel-Lewis Approach and Octet Rule and Lewis Structures
Nitrogen (N) in Group 15 has 1s² 2s² 2p³ . Gaining 3 electrons forms N³⁻ with 1s² 2s² 2p⁶ , matching Ne .
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds
Fluorine (F) in Group 17 has 1s² 2s² 2p⁵ . Gaining 1 electron forms F⁻ with 1s² 2s² 2p⁶ , matching Ne .
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds
Magnesium (Mg) in Group 2 has [Ne] 3s² . Losing 2 electrons forms Mg²⁺ with [Ne] , a noble gas configuration.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds
Mg²⁺ loses two electrons from [Ne] 3s² to form [Ne] , achieving a noble gas configuration.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Covalent Bonding - Bond Parameters and Polarity and Fajan's Rule
