Neutral atoms are ready.AtomsCharge 0Energy high

Formation of Ionic Compounds Simulation

Electron transfer, ions, attraction, and crystal lattices

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Reaction journey

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Live model

StageNeutral atoms

Transferred0 e⁻

CationNa

AnionCl

Formula and equation

2Na + Cl₂ → 2NaCl

Sodium and chlorine begin as neutral atoms. Their proton and electron counts are balanced.

Object focus

Tap an atom, electron, ion, bond, or lattice site.

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Teacher narration

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Chapters

Learning objectives

Explain electron transfer using outer-shell electrons.
Distinguish cations from anions.
Connect opposite charges to ionic bonding.
Build a repeating three-dimensional ionic lattice.
Relate ionic structure to conductivity and melting point.

Key concepts

A metal atom loses electron density and becomes a positive ion. A nonmetal gains electron density and becomes a negative ion. Electrostatic attraction between the oppositely charged ions forms an ionic compound.

Na → Na⁺ + e⁻
Cl + e⁻ → Cl⁻
2Na + Cl₂ → 2NaCl

Suggested experiments

Increase attraction and compare ion approach speed.
Compare one-electron NaCl with two-electron MgO.
Compare the one-electron NaCl model with two-electron MgO.
Pause during transfer and track the moving electron.

Questions for exploration

Why does charge remain conserved?
Why is solid NaCl nonconducting but molten NaCl conducting?
Why does an ionic crystal form a lattice instead of separate molecules?

Ionic challenge

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