NO3- Ion Structure and Properties

The video tutorial explains how to draw the Lewis structure for the NO3- ion, also known as the nitrate ion. It covers counting valence electrons, constructing the Lewis structure, and ensuring all atoms satisfy the octet rule. The tutorial also discusses formal charges, molecular geometry, and resonance structures, highlighting the trigonal planar shape and 120-degree bond angles. The video concludes with a summary of the key concepts and structures for the nitrate ion.

What is the total number of valence electrons in the NO3- ion?

• 18

• 30

• 24

• 32

Which element is placed at the center of the NO3- Lewis structure?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon

How many valence electrons does each oxygen atom have in the NO3- ion?

• 8

• 6

• 4

• 10

What is the purpose of forming a double bond in the NO3- Lewis structure?

• To change the molecular geometry

• To decrease the number of oxygen atoms

• To satisfy the octet rule for nitrogen

• To increase the number of valence electrons

What is the formal charge on the nitrogen atom in the best Lewis structure of NO3-?

• +1

• 0

• -2

• -1

What is the molecular geometry of the NO3- ion?

• Tetrahedral

• Trigonal planar

• Bent

• Linear

What is the bond angle between the atoms in the NO3- ion?

• 180 degrees

• 90 degrees

• 109.5 degrees

• 120 degrees

How many major resonance structures does the NO3- ion have?

• 3

• 2

• 4

• 1

What is the actual structure of the NO3- ion based on its resonance structures?

• A structure with only single bonds

• An average of the resonance structures

• A single structure with fixed bonds

• A structure with no double bonds

Why do we use brackets around the NO3- Lewis structure?

• To highlight the central atom

• To show it is an ion

• To denote resonance

• To indicate it is a molecule