What is meant by the term isoelectronic series? A group of atoms, ions or molecules that have the same number of electrons but different nuclear charges (e.g. examples: Np⁴⁻, mg²⁺, Al³⁺, F⁻, n²⁻ all have 10 electrons).

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Asked on June 11, 2026Chemistry

This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.

Accepted Answer · 2026-06-11T10:43:44.922Z

Here are the solutions to your questions: A) (i) Give one example each of a: (I) suspension: Muddy water (or sand in water, chalk in water) (II) colloid: Milk (or fog, smoke, paint) (ii) What is meant by the term isoelectronic series? Your definition is correct. An isoelectronic series is a group of atoms, ions, or molecules that have the same number of electrons but different nuclear charges. Your examples are also correct: Na^+, Mg^2+, Al^3+, F^-, and N^3- all have 10 electrons. ✅ Correct (iii) Define each of the following terms: (I) heat of formation: The standard enthalpy of formation ( H_f^) is defined as the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states under standard conditions (298 K and 1 atm pressure). Last free one today — make it count tomorrow, or type /upgrade for unlimited.

Accepted Answer · 2026-06-11T10:43:44.922Z

Here are the solutions to your questions: A) (i) Give one example each of a: (I) suspension: Muddy water (or sand in water, chalk in water) (II) colloid: Milk (or fog, smoke, paint) (ii) What is meant by the term isoelectronic series? Your definition is correct. An isoelectronic series is a group of atoms, ions, or molecules that have the same number of electrons but different nuclear charges. Your examples are also correct: Na^+, Mg^2+, Al^3+, F^-, and N^3- all have 10 electrons. ✅ Correct (iii) Define each of the following terms: (I) heat of formation: The standard enthalpy of formation ( H_f^) is defined as the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states under standard conditions (298 K and 1 atm pressure). Last free one today — make it count tomorrow, or type /upgrade for unlimited.

What is meant by the term isoelectronic series? A group of atoms, ions or molecules that have the same number of electrons but different nuclear charges (e.g. examples: Np⁴⁻, mg²⁺, Al³⁺, F⁻, n²⁻ all have 10 electrons).

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What is meant by the term isoelectronic series? A group of atoms, ions or molecules that have the same number of electrons but different nuclear charges (e.g. examples: Np⁴⁻, mg²⁺, Al³⁺, F⁻, n²⁻ all have 10 electrons).

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