Aluminum and Valence Electrons Concepts

The video tutorial explains how to draw the Lewis structure for ALH3 by calculating the total valence electrons, placing aluminum in the center, and arranging hydrogen atoms around it. It highlights the exceptions to the octet rule for hydrogen and aluminum, which only need two and six valence electrons, respectively. The tutorial concludes by calculating the formal charges, confirming that the structure is most likely correct with zero charges.

Which group does aluminum belong to, and how many valence electrons does it have?

• Group 14, with 4 valence electrons

• Group 2, with 2 valence electrons

• Group 13, with 3 valence electrons

• Group 1, with 1 valence electron

How many total valence electrons are there in AlH3?

• 4

• 7

• 6

• 5

Where is aluminum placed in the Lewis structure of AlH3?

• At the bottom

• At the top

• In the middle

• On the outside

Why is hydrogen an exception to the octet rule?

• It needs 2 valence electrons

• It needs 4 valence electrons

• It needs 6 valence electrons

• It needs 8 valence electrons

How many valence electrons does aluminum need for a full outer shell in AlH3?

• 6

• 4

• 2

• 8

What is the formal charge on each atom in the AlH3 Lewis structure?

• +1

• 0

• +2

• -1

What does a formal charge of 0 indicate about the Lewis structure of AlH3?

• It is unstable

• It is the most likely structure

• It has too many electrons

• It is incorrect