Lesson 7.3 Molecular Shapes

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23 questions

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(Slide 4) The gold region in the model represents

core electrons from the two atoms

electrons in a covalent bond

the nucleus of an atom

protons in a covalent bond

(slide 6) What happens when you move the red ball so that the angle between the red ball and the blue ball is less than 180°

(slide 8) The atoms in the molecule are roughly 120° apart because

120° allows the nuclei of the atoms to be as far apart as possible

120° allows the electrons in the bonds to be as far apart as possible

120° allows the atoms to be as far apart as possible

120° allows the core electrons to be as far apart as possible

(Slide 14) Draw the Lewis Dot Model of CO₂

(slide 17) Lone pairs are

a pair of electrons that belongs to only one atom and is not involved in bonding

a pair of electrons that belongs to only one atom but makes a bond in that atom

a pair of electrons shared between two atoms

In CO₂, the central atom is

How many areas of electron concentration are around the central atom of CO₂?

In a molecule with a linear shape the angle between the bonded atoms is

180°

90°

120°

109.5°

How many valence electrons are in NO₃¹⁻

24

18

11

23

Draw the Lewis Dot model for NO₃¹⁻

How many areas of electron concentration are around the central nitrogen in NO₃¹⁻?

3

4

1

2

In a molecule with a trigonal planar shape the angle between the bonded atoms is

180°

90°

120°

109.5°

Draw the Lewis Dot Model of SO₂

How many lone pairs does the central atom have in SO₂?

0

1

2

3

How many electron concentrations are around the central atom in SO₂?

1

2

3

4

In a molecule with a bent shape like SO₂, the angle between the bonded atoms is

90°

109.5°

180°

120°

How are the bent shape of SO₂ and the trigonal planar shape related?

How many electron concentrations does the central atom have in CH₄

3

1

2

4

In a molecule with a tetrahedral shape the angle between the bonded atoms is

90°

109.5°

180°

120°

How many electron concentrations does the central atom have in NH₃?

4

2

3

1

What is the relationship between the trigonal pyramid shape and the tetrahedral shape?

How many electron concentrations does the central atom have in H₂O

4

1

2

3

Which shapes is the bent shape of water most closely related to?

You can stop at slide 43

(Slide 4) The gold region in the model represents

core electrons from the two atoms

electrons in a covalent bond

the nucleus of an atom

protons in a covalent bond

(slide 8) The atoms in the molecule are roughly 120° apart because

120° allows the nuclei of the atoms to be as far apart as possible

120° allows the electrons in the bonds to be as far apart as possible

120° allows the atoms to be as far apart as possible

120° allows the core electrons to be as far apart as possible

(slide 17) Lone pairs are

a pair of electrons that belongs to only one atom and is not involved in bonding

a pair of electrons that belongs to only one atom but makes a bond in that atom

a pair of electrons shared between two atoms

In a molecule with a linear shape the angle between the bonded atoms is

180°

90°

120°

109.5°

How many valence electrons are in NO₃¹⁻

24

18

11

23

How many areas of electron concentration are around the central nitrogen in NO₃¹⁻?

3

4

1

2

In a molecule with a trigonal planar shape the angle between the bonded atoms is

180°

90°

120°

109.5°

How many lone pairs does the central atom have in SO₂?

0

1

2

3

How many electron concentrations are around the central atom in SO₂?

1

2

3

4

In a molecule with a bent shape like SO₂,  the angle between the bonded atoms is

90°

109.5°

180°

120°

How many electron concentrations does the central atom have in CH₄

3

1

2

4

In a molecule with a tetrahedral shape the angle between the bonded atoms is

90°

109.5°

180°

120°

How many electron concentrations does the central atom  have in NH₃?

4

2

3

1

How many electron concentrations does the central atom have in H₂O

4

1

2

3

Which shapes is the bent shape of water most closely related to?

trigonal planar

linear

bent shape of SO₂

trigonal pyramid

tetrahedral