Lewis Structures
Chemistry ⇒ Chemical Bonding and Structure
Lewis Structures starts at 9 and continues till grade 12.
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Describe the difference between a single, double, and triple bond in a Lewis structure.
Describe the steps involved in drawing a Lewis structure for a simple molecule.
Draw the Lewis structure for carbon dioxide (CO2). How many double bonds are present?
Explain why helium does not form bonds in Lewis structures.
Explain why hydrogen can only form one single bond in a Lewis structure.
How many lone pairs are present on the central atom in the Lewis structure of ammonia (NH3)?
How many single bonds are present in the Lewis structure of ethane (C2H6)?
How many valence electrons are present in a molecule of ammonia (NH3)?
Which of the following best describes a resonance structure?
(1) A structure with more than one central atom
(2) A structure where electrons are shared unequally
(3) Different possible arrangements of electrons in a molecule
(4) A structure with only single bonds
Which of the following elements can form a double bond in a Lewis structure?
(1) Hydrogen
(2) Oxygen
(3) Sodium
(4) Neon
Which of the following is NOT a correct step in drawing a Lewis structure?
(1) Count the total number of valence electrons.
(2) Arrange atoms to show specific connections.
(3) Assign all electrons to the central atom first.
(4) Complete the octets of outer atoms before the central atom.
Which of the following is the correct Lewis structure for the chloride ion (Cl-)?
(1) Cl with 7 dots
(2) Cl with 8 dots and a negative charge
(3) Cl with 6 dots
(4) Cl with 8 dots and a positive charge
The Lewis structure for the ammonium ion (NH4+) contains ____ bonds between nitrogen and hydrogen.
The Lewis structure for the hydroxide ion (OH-) contains ____ lone pairs on the oxygen atom.
The Lewis structure for water (H2O) shows the oxygen atom with ____ lone pairs of electrons.
The total number of valence electrons in the Lewis structure of SO2 is ____.
True or False: In a Lewis structure, each line between atoms represents a pair of shared electrons.
True or False: Lone pairs of electrons are always shown as dots in Lewis structures.
True or False: The Lewis structure for hydrogen chloride (HCl) shows a single bond between hydrogen and chlorine.
True or False: The Lewis structure for methane (CH4) shows four single bonds between carbon and hydrogen.
