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Lesson 7.3 Molecular Shapes

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You can stop at slide 43

In this formative, you will explore how repulsion between electrons in the bonding orbitals gives covalent molecules specific shapes. To get started go to the Molecular Shapes tutorial on PBS learning media using the link below.

ca.pbslearningmedia.org/resource/lsps07.sci.phys.matter.molecularshp/molecular-shapes/?student=true

The questions in the formative mirror the questions in the tutorial.

In this formative, you will explore how repulsion between electrons in the bonding orbitals gives covalent molecules specific shapes. To get started go to the Molecular Shapes tutorial on PBS learning media using the link below.

ca.pbslearningmedia.org/resource/lsps07.sci.phys.matter.molecularshp/molecular-shapes/?student=true

The questions in the formative mirror the questions in the tutorial.

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1.

(Slide 4) The gold region in the model represents

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2.

(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°

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3.

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

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4.

(Slide 14) Draw the Lewis Dot Model of CO₂

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5.

(slide 17) Lone pairs are

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6.

In CO₂, the central atom is

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7.

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

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8.

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

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9.

How many valence electrons are in NO₃¹⁻

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10.

Draw the Lewis Dot model for NO₃¹⁻

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11.

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

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12.

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

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13.

Draw the Lewis Dot Model of SO₂

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14.

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

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15.

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

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16.

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

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17.

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

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18.

How many electron concentrations does the central atom have in CH₄

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19.

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

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20.

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

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21.

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

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22.

How many electron concentrations does the central atom have in H₂O

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23.

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