AlF6 3- Ion Structure and Properties

This video tutorial explains how to write the Lewis structure for AlF6 3-. It begins by counting the valence electrons, placing the least electronegative element, aluminum, at the center, and arranging six fluorine atoms around it. The video details the process of forming chemical bonds and completing the octets, considering aluminum's ability to have an expanded octet. The tutorial also covers the molecular geometry, which is octahedral, and the bond angles, using AXE notation to describe the structure. The video concludes with a summary of the Lewis structure, molecular geometry, and bond angles.

What is the total number of valence electrons in the AlF6 3- ion?

• 36

• 54

• 48

• 42

Which element is placed at the center of the AlF6 3- Lewis structure?

• Aluminum

• Fluorine

• Oxygen

• Nitrogen

How many valence electrons are used to form chemical bonds initially in the AlF6 3- structure?

• 8

• 6

• 12

• 10

What allows aluminum to have more than an octet in the AlF6 3- structure?

• It is a metal

• It is highly electronegative

• It can have an expanded octet

• It forms ionic bonds

What is the purpose of placing brackets around the Lewis structure of AlF6 3-?

• To indicate it is a molecule

• To show it is an ion

• To highlight the central atom

• To denote resonance

What is the molecular geometry of the AlF6 3- ion?

• Octahedral

• Linear

• Tetrahedral

• Trigonal planar

How many lone pairs are present in the AlF6 3- structure?

• 0

• 2

• 4

• 6

What is the AXE notation for the AlF6 3- ion?

• AX6

• AX5

• AX4

• AX3

What is the bond angle in the octahedral geometry of AlF6 3-?

• 109.5 degrees

• 180 degrees

• 120 degrees

• 90 degrees

Why is the electron geometry the same as the molecular geometry in AlF6 3-?

• It is a linear molecule

• No lone pairs are present

• Due to resonance

• Because of lone pairs