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#group 1

9 public questions tagged with this topic.

CHEMISTRY

Which compound involves ionic bonding between a group 1 element and a group 16 element?

Given: Which compound involves ionic bonding between a group 1 element and a group 16 element? These values define the system as per NCERT data. Formula: K₂S forms by electron transfer from potassium (group 1) to sulfur (group 16), creating K^+ and S²- .. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Substituting values like 1.2 × 10⁻⁵, 236 J kg⁻¹ K⁻¹, CH₃CH₂NH₂ etc. into the formula and simplifying step by step. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.

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CHEMISTRY

Which compound involves the formation of an electrovalent bond between a group 1 and a group 17 element?

KF forms by electron transfer from potassium (group 1) to fluorine (group 17), creating K^+ and F^-, an ionic bond. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.

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CHEMISTRY

Which compound involves ionic bonding between a group 1 element and a group 16 element?

Given: Which compound involves ionic bonding between a group 1 element and a group 16 element? These values define the system as per NCERT data. Formula: Na₂O forms by electron transfer from sodium (group 1) to oxygen (group 16), creating Na^+ and O²- .. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Substituting values like 1.2 × 10⁻⁵, 236 J kg⁻¹ K⁻¹, CH₃CH₂NH₂ etc. into the formula and simplifying step by step. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.

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Periodic Trends - Atomic Radii Ionic Radii and Ionization Enthalpy

Which element in group 1 has the lowest second ionization enthalpy?

Second ionization enthalpy for group 1 elements involves removing an electron from X+ (noble gas configuration). Cs⁺ (largest size) has the lowest value due to reduced nuclear attraction.

Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Periodic Trends - Atomic Radii Ionic Radii and Ionization Enthalpy

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