Video summary
What are Ionic Bonds? | Properties of Matter | Chemistry | FuseSchool
Main summary
Key takeaways
Main Ideas
- Ions form when atoms transfer electrons. An atom that loses electrons becomes positively charged, while an atom that gains electrons becomes negatively charged.
- Ionic bonds are electrostatic attractions between oppositely charged ions. The attraction remains after the electrons are transferred.
- Ionic compounds are electrically neutral overall: their positive and negative charges must balance.
Examples
- Sodium chloride (NaCl): Sodium transfers one electron to chlorine, forming Na⁺ and Cl⁻. Their opposite charges attract.
- Magnesium oxide (MgO): Magnesium transfers two electrons to oxygen, forming Mg²⁺ and O²⁻. Their charges balance in a 1:1 ratio.
- Calcium chloride (CaCl₂): Calcium loses two electrons, transferring one to each of two chlorine atoms. This forms Ca²⁺ and two Cl⁻ ions, whose charges balance.
Practice
Pause and draw the ions formed by magnesium and oxygen, including their charges.
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