How to Draw the Lewis Dot Structure for BaS: Barium sulfide

author Wayne Breslyn   2 мес. назад

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

For BaS 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:

Next, we'll draw the Lewis Structure for the S 2- ion and add brackets. We put the two ions together to complete the Lewis structure for BaS. Note that BaS is also called Barium sulfide.

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

For more practice, see

To learn to find the valence electrons:

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 BaS we think of it together with other BaS formula units in a crystal (NaCl is a good example of this:

Get more chemistry help at

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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