Silicon Valence Electrons and Structures

Dr. B explains how to draw the Lewis structure for SiH4. Silicon has 4 valence electrons and each of the four hydrogens has 1, totaling 8 valence electrons. Silicon is placed in the center with hydrogens around it. Two electrons are placed between each Si-H pair to form bonds, using all 8 electrons. Hydrogen achieves a full outer shell with 2 electrons, and silicon with 8. The video concludes with a complete SiH4 Lewis structure.

How many valence electrons does Silicon have?

• 4

• 8

• 6

• 2

In the Lewis structure of SiH4, where is Silicon placed?

• In the center

• On the outside

• At the bottom

• At the top

How many total valence electrons are used in the SiH4 structure?

• 10

• 12

• 8

• 6

How many electrons does each Hydrogen atom need to achieve a full outer shell?

• 8

• 1

• 2

• 4

What is the total number of electrons needed by Silicon to complete its outer shell in SiH4?

• 2

• 8

• 4

• 6