CB in CO2,nitrogen,oxygen

• What should you be able to describe by the end of the video on covalent bonding?

  How electrons are shared in covalent bonding
• What types of diagrams should you be able to draw after watching the video?

  Diagrams showing covalent bonding with double and triple covalent bonds
• What small covalent molecules were discussed in the previous videos?

  • Hydrogen
  • Chlorine
  • Hydrogen chloride
  • Water
  • Ammonia
  • Methane
• What type of bond do all the small covalent molecules mentioned have?

  Single covalent bonds
• What is a single covalent bond?

  A shared pair of electrons
• What are the characteristics of the oxygen molecule (O2)?

  • Contains two atoms of oxygen
  • Each oxygen atom has six electrons in the outer energy level
  • Requires two more electrons for a full outer energy level
  • Forms a double covalent bond
• What is the formula for an oxygen molecule?

  O2
• How do oxygen atoms achieve a full outer energy level?

  By overlapping their outer energy levels
• What is a double covalent bond?

  Two shared pairs of electrons
• What are the characteristics of the nitrogen molecule (N2)?

  • Contains two atoms of nitrogen
  • Each nitrogen atom has five electrons in the outer energy level
  • Requires three more electrons for a full outer energy level
  • Forms a triple covalent bond
• What is the formula for a nitrogen molecule?

  N2
• How do nitrogen atoms achieve a full outer energy level?

  By overlapping their outer energy levels
• What is a triple covalent bond?

  Three shared pairs of electrons
• What are the characteristics of the carbon dioxide molecule (CO2)?

  • Contains one atom of carbon and two atoms of oxygen
  • Carbon has four electrons in its outer energy level
  • Each oxygen has six electrons in its outer energy level
  • Carbon forms a double covalent bond with each oxygen atom
• What is the formula for carbon dioxide?

  CO2
• How many electrons does a carbon atom require to achieve a full outer energy level?

  Four more electrons
• How many electrons does an oxygen atom require to achieve a full outer energy level?

  Two more electrons
• How do the carbon and oxygen atoms achieve a full outer energy level in carbon dioxide?

  By overlapping their outer energy levels
• How is a double covalent bond represented in stick diagrams?

  As two lines
• How is a triple covalent bond represented in stick diagrams?

  As three lines
• What should AQA students do regarding carbon dioxide in their studies?

  • Carbon dioxide is not on the AQA specification
  • However, it is recommended to watch the video
  • They could be asked to work out the structure in their exam
• Where can students find more questions on covalent bonding?

  • In the vision workbook
  • Available through a link provided in the video