To draw the Lewis dot structure on the [tex]B_aCO_3[/tex] molecular it is necessary to show the electron sharing between the [tex]CO_3[/tex] molecules, and then show the ionic bond between [tex]B_a[/tex] and [tex]CO_3[/tex].
You can see how this is done in the attached image.
We can arrive at this answer because:
- The Lewis dot structure is made to show the sharing or transmission of electrons between atoms.
- In the [tex]B_aCO_3[/tex] molecule, we have both sharing and transmission of electrons, which occurs for atoms to search for stability in their valence layers.
- The compound [tex]CO_3[/tex] has covalent bonds, where the electrons share the electrons so that each one is electronically stable.
- However, the [tex]B_a[/tex] atom needs to transmit two electrons to another molecule to achieve stability, so when it forms a bond with [tex]CO_3[/tex], it transmits two electrons to that compound.
- This causes [tex]CO_3[/tex] to be negatively charged, while [tex]B_a[/tex] is positively charged.
Therefore, we can say that [tex]B_a[/tex] forms an ionic bond with [tex]CO_3[/tex].
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