Lewis Dot Structures Review (Absent)

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What is a Lewis Dot Structure?

Back

A Lewis Dot Structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

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How do you determine the total number of valence electrons in a molecule?

Back

To determine the total number of valence electrons, add the valence electrons of each atom in the molecule based on its group number in the periodic table.

Front

What is the Lewis Dot Structure for ammonia (NH3)?

Back

The Lewis Dot Structure for ammonia shows nitrogen in the center with three hydrogen atoms bonded to it and one lone pair of electrons on nitrogen.

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What is the molecular structure of carbon dioxide (CO2)?

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The molecular structure of carbon dioxide consists of a carbon atom double bonded to two oxygen atoms, with no lone pairs on the carbon.

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What is the correct Lewis structure for water (H2O)?

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The correct Lewis structure for water shows oxygen in the center with two hydrogen atoms bonded to it and two lone pairs of electrons on oxygen.

Front

What is the significance of lone pairs in Lewis Dot Structures?

Back

Lone pairs represent non-bonding electrons that can affect the shape and reactivity of the molecule.

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How do you represent a double bond in a Lewis Dot Structure?

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A double bond is represented by two lines between the atoms, indicating that two pairs of electrons are shared.

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What is the Lewis structure for CH3Cl?

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The Lewis structure for CH3Cl shows a carbon atom bonded to three hydrogen atoms and one chlorine atom, with chlorine having three lone pairs.

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What is the octet rule in relation to Lewis Dot Structures?

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The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

How do you identify the central atom in a Lewis Dot Structure?

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The central atom is usually the least electronegative atom or the atom that can form the most bonds.