Lewis Diagrams and Cyanide Anion

This video tutorial guides viewers through constructing a Lewis diagram for the cyanide anion. It begins by counting the total valence electrons of carbon and nitrogen, considering the extra electron due to the negative charge. The tutorial then demonstrates drawing single bonds and allocating remaining valence electrons. To satisfy the octet rule, higher order bonds are formed by converting lone pairs into covalent bonds. Finally, the video shows how to represent the negative charge in the Lewis diagram, ensuring all valence electrons are accounted for and the octet rule is satisfied.

What is the main focus of this video tutorial?

• Understanding the periodic table

• Constructing Lewis diagrams for ions

• Constructing Lewis diagrams for neutral molecules

• Learning about covalent bonds

How many valence electrons does a neutral carbon atom have?

• Six

• Four

• Two

• Eight

What additional step is needed when dealing with an anion?

• Subtracting a valence electron

• Doubling the valence electrons

• Adding a valence electron

• Ignoring the charge

What is the first step in constructing the Lewis diagram for cyanide?

• Drawing double bonds

• Allocating lone pairs

• Identifying the central atom

• Counting total valence electrons

How many valence electrons are left after forming a single bond between carbon and nitrogen?

• Six

• Four

• Eight

• Two

Why might additional bonds be formed between carbon and nitrogen?

• To make the molecule more reactive

• To increase the molecule's size

• To satisfy the octet rule

• To decrease the molecule's energy

What is the purpose of forming higher order bonds in the cyanide ion?

• To increase the number of lone pairs

• To make the molecule neutral

• To satisfy the octet rule for both atoms

• To reduce the number of electrons

How is the negative charge represented in the final Lewis diagram?

• By adding extra electrons

• By using brackets around the molecule

• By drawing a minus sign next to carbon

• By highlighting the nitrogen atom

What rule is checked to ensure the stability of the Lewis diagram?

• The electronegativity rule

• The triple bond rule

• The octet rule

• The duet rule

What indicates that the Lewis diagram is complete?

• All atoms have a full outer shell

• The molecule is neutral

• All electrons are paired

• The diagram is symmetrical