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===Meaning===
A '''dot and cross diagram''' is a [[diagram]] used to show how [[electron]]s from the [[Outer Shell|outer shells]] of [[atom]]s are shared or transferred in a [[Chemical Bond|chemical bond]].
===About Dot and Cross Diagrams===
: '''Dot and cross diagrams''' can be used to represent [[Covalent Bond|covalent bonds]] and [[Ionic Bond|ionic bonds]].
===Examples===
{| class="wikitable"
|+ Covalent Bonds
|-
|[[File:OxygenDotandCrossDiagram.png|center|175px]]
|[[File:NitrogenDotandCrossDiagram.png|center|175px]]
|[[File:CarbonDioxideDotandCrossDiagram.png|center|250px]]
|-
| style="height:20px; width:175px; text-align:center;" |The two [[Oxygen]] [[atom]]s each share two of their [[electron]]s with one another.
| style="height:20px; width:175px; text-align:center;" |The two [[Nitrogen]] [[atom]]s each share three of their [[electron]]s with one another.
| style="height:20px; width:250px; text-align:center;" |Each [[Oxygen]] shares two of its [[electron]]s with the [[Carbon]] [[atom]] while the [[Carbon]] [[atom]] shares two [[electron]]s with each [[Oxygen]] [[atom]].
|}
{| class="wikitable"
|+ Ionic Bonds
|-
|[[File:LithiumFluorideDotandCrossDiagram.png|center|200px]]
|[[File:MagnesiumOxideDotandCrossDiagram.png|center|200px]]
|[[File:BerylliumFluorideDotandCrossDiagram.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |The [[Lithium]] [[atom]] donates an [[electron]] from its [[Outer Shell|outer shell]] to the [[Outer Shell|outer shell]] of the [[Fluorine]] [[atom]].
| style="height:20px; width:200px; text-align:center;" |The [[Magnesium]] [[atom]] donates two [[electron]]s from its [[Outer Shell|outer shell]] to the [[Outer Shell|outer shell]] of the [[Oxygen]] [[atom]].
| style="height:20px; width:200px; text-align:center;" |The [[Beryllium]] [[atom]] donates two [[electron]]s from its [[Outer Shell|outer shell]] to the [[Outer Shell|outer shells]] of each [[Fluorine]] [[atom]].
|}