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Three bonds should be drawn in the Lewis dot structure for SO3. Sulfur forms a double bond with one oxygen atom and single bonds with the other two oxygen atoms to complete its octet.
In the Lewis dot structure for BH3, there should be 3 bonds drawn. Each hydrogen atom forms a single covalent bond with the boron atom. Boron has three valence electrons, so it can form three bonds with the hydrogen atoms.
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For fluorine: 8 dots.
A Lewis dot structure for potassium (K) would have one dot, representing its single valence electron.
Three bonds should be drawn in the Lewis dot structure for SO3. Sulfur forms a double bond with one oxygen atom and single bonds with the other two oxygen atoms to complete its octet.
An atom of potassium should have one dot in its Lewis-dot structure. This dot represents the single valence electron in the outer shell of the potassium atom.
In the Lewis dot structure for BH3, there should be 3 bonds drawn. Each hydrogen atom forms a single covalent bond with the boron atom. Boron has three valence electrons, so it can form three bonds with the hydrogen atoms.
In a Lewis dot structure for an oxygen atom, there should be six dots. Lone pairs of electrons are represented by dots around the symbol for the atom. Oxygen has six valence electrons, so it will have a total of six dots in its Lewis dot structure.