L11 Giant covalent structures Part II

  • You can go to the bathroom until 9:50AM. Leaving the room during our session is NOT allowed.
  • Keep your shirt tucked in. The person who is untucked will PRESENT A TOPIC NEXT WEEK.
  • Prepare your chemistry materials.
  • Put your phone in the tray.
Before we begin:
1 / 22
suivant
Slide 1: Diapositive
ChemSecondary Education

Cette leçon contient 22 diapositives, avec quiz interactifs et diapositives de texte.

Éléments de cette leçon

  • You can go to the bathroom until 9:50AM. Leaving the room during our session is NOT allowed.
  • Keep your shirt tucked in. The person who is untucked will PRESENT A TOPIC NEXT WEEK.
  • Prepare your chemistry materials.
  • Put your phone in the tray.
Before we begin:

Slide 1 - Diapositive

Lesson 11
Giant Covalent Structures

10-10-2022

Slide 2 - Diapositive

Choose an emoji to tell us how you feel today.
😒🙁😐🙂😃

Slide 3 - Sondage

  • make a 3D model of diamond and /or graphite as giant covalent structures using candies and toothpicks
  • explain metallic bonding (by Ratanak)
Success Criteria

Slide 4 - Diapositive

Language 
development

Slide 5 - Diapositive

  • giant covalent structure
  • physical properties
  • covalent bonding
  • hardness
Know the keywords

  • appearance
  • electrical conductivity

Slide 6 - Diapositive

Slide 7 - Diapositive

  • each carbon atom bonds with four other carbons, forming a tetrahedron
Diamond

Slide 8 - Diapositive

  • All the covalent bonds are identical, very strong.
  • There are NO intermolecular forces.
Diamond

Slide 9 - Diapositive

Physical properties:
- does NOT conduct electricity
- very high melting point extremely dense and hard
Diamond

Slide 10 - Diapositive

Slide 11 - Diapositive

  • Each carbon atom is bonded to three others forming layers of hexagonal-shaped forms, leaving one free electron per carbon atom
Graphite

Slide 12 - Diapositive

  • Free (delocalised) electrons exist in between the layers and are free to move through the structure and carry charge, hence graphite CAN conduct electricity.
Graphite

Slide 13 - Diapositive

  • The covalent bonds within the layers are very strong BUT the layers are connected to each other by weak forces only, hence the layers CAN slide over each other making graphite slippery and smooth
Graphite

Slide 14 - Diapositive

PHYSICAL PROPERTIES
- CAN conduct electricity
- has VERY HIGH melting point
- is soft and slippery, less dense than diamond
Graphite

Slide 15 - Diapositive

Slide 16 - Diapositive

Slide 17 - Diapositive

3D Model-making
  • Group work
  • Make 3D model of:
- T1, 2, 5: Diamond
- T3, 4: Graphite 
  • You only have 10 minutes.
  • Checking!
timer
10:00

Slide 18 - Diapositive

Writing your Conclusion
  • Individual; written
  • Write your final answers to the given questions.
  • You only have 7 minutes.
  • Checking!
timer
7:00

Slide 19 - Diapositive

Self - Evaluation
😁 - I can do this! I am ready to try something new.
😅 - I am getting there! I need a bit of help. I am a bit unsure. I might need to practice.
😬 - I need help! I don't understand this. I am not ready to move on yet.
timer
1:00
😁
😅
😬

Slide 20 - Sondage

Slide 21 - Diapositive

  • Tuesday - End of Chapter 3 Test 3
  • Wednesday - Project-planning and initial construction
  • Friday - Chapter 4.1 , Lesson 12. Molecular formulae
Up next!

Slide 22 - Diapositive