Allotropes Of Carbon With Giant Covalent Structures Powerpoint.ppt
- 1. The UNIQUE PROPERTIES and ALLOTROPES of CARBON PERFORMANCE TASK: The ALLOTROPICS of CARBON
- 2. LEARNING OBJECTIVES 1. Explain how the structure of the carbon atom affects the type of bonds it forms; (S9MT-IIg-h-17) 2. Discuss the unique properties of carbon atom.
- 3. True or False? It’s C. 1. The symbol for carbon is ‘Ca’. 2. Carbon is a non-metal. It’s electron configuration is 2, 4. 3. Carbon has 6 electrons on its outer shell. 4. Carbon is relatively unreactive. It’s the fourth. 5. Carbon is the tenth most common element. False True False True False True False True False True False True False True False
- 4. Carbon Carbon is found in group 4 of the periodic table. Carbon will covalently bond to other non-metal elements. For example, carbon dioxide, carbon monoxide, glucose and methane.
- 5. Carbon Carbon will also bond to itself and can create giant covalent structures with unique properties. These are called ‘allotropes’ from the Greek meaning ‘other forms’. Photo courtesy of (@Wikimedia.org) - granted under creative commons licence – attribution
- 6. Carbon Being in group 4, there are four outer electrons which can be bonded in many different ways. Tetrahedrons, hexagons, pentagons and even heptagons.
- 7. Allotropes of Carbon Research Now complete the activity sheet to research different allotropes of carbon.
- 8. Silicon Dioxide Pause for Thought From the picture and your research, can you guess what properties it has? Silicon dioxide, sometimes called silica, is a giant covalent structure.
- 9. Silicon Dioxide Silicon dioxide has a similar structure to diamond. It is most commonly known as sand! The atoms of silicon and oxygen are covalently bonded in tetrahedrons. Therefore, it shares many properties, such as a high melting point of 1610°C and a high boiling point of 2230°C. Photo courtesy of (@Wikimedia.org) - granted under creative commons licence – attribution
- 10. Allotropes of The Future ‘Cage-like’ structures of pure carbon were discovered in 1985. They were made of sixty carbon atoms! These hollow football shaped molecules contain 20 hexagons and 12 pentagons. They can be used to deliver drugs into the body or as catalysts, due to their large surface area.
- 11. Allotropes of The Future This was named ‘Buckminsterfullerene’ after the architect who used geodesic domes in his designs and ‘ene’ as there are double bonds. It is not a giant covalent structure, but a giant molecule! (Macromolecule.) Photo courtesy of sebaso (@flickr.com) - granted under creative commons licence – attribution
- 12. Allotropes of The Future Fullerenes can also exist as tubes or cylinders. These are called ‘nanotubes’ as they are 1-100 nanometres in size. To put this into context, the width of a human hair is approximately 75 000 nanometres!
- 13. Allotropes of The Future Nanotubes can conduct electricity (in one direction) and thermal energy. They are incredibly strong, yet light. They are used in electronic circuits. They are used in tennis rackets too!
- 14. Exam Style Question Now complete the exam style question to show your understanding of today’s lesson.
- 15. Plenary Complete the activity sheet to demonstrate your understanding of allotropes of carbon and giant covalent structures.
- 16. What Did You Achieve Today? I can identify giant covalent structures and allotropes of carbon. I can define the properties of giant covalent structures and other carbon allotropes. I can explain the properties of giant covalent structures and other carbon allotropes.