Lewis Dot Structures, Covalent and Ionic

What is a valence electron?

• The sum of neutrons and protons.
• The # of electrons in the last shell.
• A type of bond.
• A popular compound.

Which of the following is the correct Lewis structure for CH₂O?

• Option A
• Option B
• Option C
• Option D

Choose the structure that forms a triple bond. You will need to write these down and/or look in your notes.

• Hydrogen

• Fluorine

• Oxygen

• Nitrogen

NH₃ has how many lone pairs? You may need to write this one down to figure it out.

• 0

• 1

• 2

• 3

Which atom goes in the middle of the Lewis Dot structure?

• The one the needs the least number of valence electrons

• The most electronegative element

• The one that needs the most or is less electronegative generally

Covalent bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

These conduct electricity well.

• Metallic bonds

• ionic bonds

• covalent bonds

What would the "A" be for CH₃F when figuring out the Lewis Dot?

• (1 x 8 ) + (3 x 2 ) + (1 x 8) = 22

• (1 x 4) + (3 x 1) + (1 x 7) = 14

When figuring out Lewis Dots for Covalent compounds what does "A" mean?

• A = the total available valence electrons of all the atoms

• A = the available valence electrons of one atom

• A = the total valence electrons the atoms wants to have in its outer shell

• A = the number of shared electrons

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom