A step-by-step explanation of how to draw the CaF2 Lewis Dot Structure.

For CaF2 we have an ionic compound and we need to take that into account when we draw the Lewis Structure. We’ll first draw the metal and put it in brackets with its charge on the outside (video: finding ionic charge: [ Ссылка ]).

Next, we'll draw the Lewis Structure for the F- ion and add brackets. We put the two ions together to complete the Lewis structure for CaF2. Note that CaF2 is also called Calcium fluoride.

For a complete tutorial on drawing Lewis Structures, see my video: [ Ссылка ]

For more practice, see [ Ссылка ]

To learn to find the valence electrons: [ Ссылка ]

Note that is it more common to draw Lewis Structures for covalent (molecular) compounds where valance electrons are shared. In the case of ionic compounds, where we have a metal bonded to a non-metal (or group of non-metals), the Lewis diagram represents a formula unit. Many of these formula units make up a crystal lattice. So when we talk about the structure for CaF2 we think of it together with other CaF2 formula units in a crystal (NaCl is a good example of this: [ Ссылка ]).

----- Lewis Resources -----
• Lewis Structures for Ionic Compounds: [ Ссылка ]
• Lewis Structures for Covalent Compounds: [ Ссылка ]
• Counting Valence Electrons: [ Ссылка ]
• Calculating Formal Charge: [ Ссылка ]
• Exceptions to the Octet Rule: [ Ссылка ]

More chemistry help at [ Ссылка ].

Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).

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