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I3- Ion Properties and Geometry

I3- Ion Properties and Geometry

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Olivia Brooks

FREE Resource

The video tutorial explains the molecular geometry of the triiodide ion (I3-). It begins with an introduction to the ion and its structure, followed by a detailed explanation of its Lewis structure, highlighting the octet rule and expanded octet for iodine. The tutorial then visualizes the molecular geometry, showing how the iodine atoms and lone pairs arrange themselves to form a linear shape. The AXE notation is used to further understand the geometry, identifying it as linear with a trigonal bipyramidal electron geometry. The video concludes with a summary of the key points discussed.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the charge of the triiodide ion?

Neutral

Negative

Positive

Variable

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many iodine atoms are present in the triiodide ion?

One

Four

Two

Three

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the Lewis structure of I3-, what is unique about the central iodine atom?

It has fewer than eight electrons.

It has an expanded octet.

It has a standard octet.

It is not bonded to any other atoms.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many lone pairs are present in the I3- ion?

Three

Two

One

Four

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molecular geometry of the I3- ion?

Linear

Tetrahedral

Bent

Trigonal planar

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the bond angle in the linear geometry of I3-?

120°

90°

109.5°

180°

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the electron geometry of the I3- ion?

Octahedral

Tetrahedral

Trigonal bipyramidal

Linear

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