Understandings● Positive ions (cations) form by metals losing valence electrons.
● Negative ions (anions) form by non-metals gaining electrons. ● The number of electrons lost or gained is determined by the electron confi guration of the atom. ● The ionic bond is due to electrostatic attraction between oppositely charged ions. ● Under normal conditions, ionic compounds are usually solids with lattice structures. |
Applications and skills● Deduction of the formula and name of an ionic compound from its component ions, including
polyatomic ions. Guidance Students should be familiar with the names of these polyatomic ions: NH4+, OH–, NO3–, HCO3–, CO32–, SO42–, and PO43– ● Explanation of the physical properties of ionic compounds (volatility, electrical conductivity, and solubility) in terms of their structure. |
Additional Resources
Chemical bonding overview videos
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Innovation: Demonstrating understanding on chemical bonding in innovative ways
Examples of Songs
Role play (even with animals)
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Student Practical: Growing your own crystal - ionic bonding
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Polyatomic ions quiz - Kahoot |
Ionic bonding and ionic compounds
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Physical properties of ionic compounds that reflect the lattice structureTask:
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