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Simple molecules and covalent bonds
Explain that a covalent bond occurs when two atoms share a pair of electrons, resulting in electronic configurations similar to noble gases.
4
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40
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28
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90 min
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CambridgeIGCSECombined ScienceAtoms, elements and compounds
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Simple molecules and covalent bonds outcomes4 objectives
- Explain that a covalent bond occurs when two atoms share a pair of electrons, resulting in electronic configurations similar to noble gases.
- Illustrate how covalent bonds are formed in simple molecules such as H₂, Cl₂, H₂O, CH₄, NH₃, and C₂H₄, using dot-and-cross diagrams to represent their electronic configurations.
- Outline the characteristics of simple molecular compounds, including their low melting and boiling points, as well as their poor electrical conductivity.
- Explain the formation of covalent bonds in additional simple molecules such as CH₃OH, C₂H₄, O₂, CO, and N₂, using dot-and-cross diagrams to depict their electronic configurations.
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