Quick Answer:The Formation of Chlorine Ion Model is a chemistry teaching model showing a chlorine atom gaining one electron to complete its outer shell and become the negatively charged chloride ion, Cl−.
Last updated: 19 October 2026
Key Features
Shows a chlorine atom taking one extra electron into its outer shell.
Represents the resulting chloride ion (Cl−) as a stable anion.
Atom diagram, electron markers and ion representation included.
Supports lessons on valency, anion formation and ionic bonding.
Technical Specifications
Specification
Value
Ion formed
Chloride ion, Cl−
Change shown
Gain of one electron
Components
Atom diagram, electron markers, ion representation
How It Is Used
Students count the electrons in the outer shell of the chlorine atom, add one electron marker and watch the atom become a chloride ion. With a periodic table beside it, the teacher can explain why chlorine tends to gain a single electron to complete its octet. It suits middle and secondary school classes.
Frequently Asked Questions
Why does the atom in the Formation of Chlorine Ion Model gain an electron?
Gaining one electron completes the outer shell of chlorine and gives a stable arrangement; the atom then carries a negative charge as the chloride ion, Cl−.
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