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#group 2

6 public questions tagged with this topic.

CHEMISTRY

Which compound involves ionic bonding between a group 2 element and a group 16 element?

Given: Which compound involves ionic bonding between a group 2 element and a group 16 element? Formula: BaO forms by electron transfer from barium (group 2) to oxygen (group 16), creating Ba²+ and O²- .. Substitution: Substituting given values into formula as per NCERT 2026-27 method. Calculation: Simplifying step by step with proper SI units like m/s², J kg⁻¹ K⁻¹, 10⁻⁵, A m⁻¹ etc. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.

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CHEMISTRY

Which compound involves ionic bonding between a group 2 element and a group 17 element?

Given: Which compound involves ionic bonding between a group 2 element and a group 17 element? These values define the system as per NCERT data. Formula: MgCl₂ forms by electron transfer from magnesium (group 2) to chlorine (group 17), creating Mg²+ and Cl^- .. 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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Genesis of Periodic Classification - Dobereiner Newlands Mendeleev

Which element in group 2 has the highest hydration enthalpy due to its ionic size?

Hydration enthalpy increases with smaller ionic size and higher charge density. Be²⁺ (smallest in group 2) has the highest hydration enthalpy compared to Mg²⁺, Ca²⁺, or Sr²⁺.

Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev

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Electronic Configuration and Types of Elements - s p d f Blocks

Which element in group 2 has the highest second ionization enthalpy?

Second ionization enthalpy for group 2 elements involves removing an electron from X+ (noble gas-like). Be⁺ (smallest size) has the highest value due to greater nuclear attraction.

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

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