Valence Electrons and Lewis Structures

Dr. B explains how to draw the Lewis structure for H2Se. Starting with the valence electrons, he identifies that Hydrogen has one and Selenium has six, totaling eight electrons. Hydrogen is placed on the outside, with Selenium in the center. Chemical bonds are formed, ensuring Hydrogen's octet is satisfied. The remaining electrons complete Selenium's outer shell, finalizing the structure.

How many valence electrons does Selenium have in the periodic table?

• 16

• 6

• 1

• 8

Where is Hydrogen typically placed in a Lewis structure?

• Above the central atom

• On the outside

• Next to Oxygen

• In the center

What is the total number of valence electrons used in the Lewis structure for H2Se?

• 6

• 12

• 8

• 10

How many valence electrons does Hydrogen need to satisfy its outer shell?

• 8

• 4

• 2

• 1

What is the significance of completing the outer shell in a Lewis structure?

• It increases the number of valence electrons

• It satisfies the octet rule

• It ensures chemical reactivity

• It makes the molecule unstable