2.6.1

Ions

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Ions

Ions are particles that have a charge. They are created when an atom or molecule gains or loses electrons. Gaining electrons creates a negatively charged ion; losing electrons creates a positively charged ion.

Illustrative background for Positive ions (cations)Illustrative background for Positive ions (cations) ?? "content

Positive ions (cations)

  • Positive ions are usually created when an atom or molecule loses electrons.
  • Positive ions are also called cations.
  • The metals in Group 1 and 2 can easily lose electrons to become positively charged ions.
Illustrative background for Negative ions (anions)Illustrative background for Negative ions (anions) ?? "content

Negative ions (anions)

  • Negative ions are usually created when an atom or molecule gains electrons.
  • Negative ions are also called anions.
  • The non-metals in Group 7 are most likely to gain electrons to fill up their electron shell and become negatively charged.
Illustrative background for Ions containing multiple elementsIllustrative background for Ions containing multiple elements ?? "content

Ions containing multiple elements

  • Ions can be made up of:
    • 1 atom (e.g. F-).
    • Combinations of atoms with an overall charge (e.g. SO42-).

Jump to other topics

1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Thinking Scientifically

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