Valence Electrons and Ionic Compounds

The video tutorial explains how to write the Lewis structure for NH4OH, which consists of two ions: NH4+ (ammonium) and OH- (hydroxide). It details the process of calculating valence electrons and constructing the Lewis structures for each ion. The tutorial also describes how these ions combine to form the ionic compound NH4OH, highlighting the interaction between covalent and ionic bonds.

What are the two ions that make up NH4OH?

• Calcium and Carbonate

• Potassium and Nitrate

• Sodium and Chloride

• Ammonium and Hydroxide

How many valence electrons are present in the NH4+ ion?

• 8

• 10

• 6

• 12

In the NH4+ Lewis structure, which element is placed at the center?

• Hydrogen

• Oxygen

• Carbon

• Nitrogen

What charge does the ammonium ion (NH4+) carry?

• Negative

• Positive

• Neutral

• Variable

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

• 7

• 9

• 8

• 6

Which element is central in the OH- Lewis structure?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What is the charge on the hydroxide ion (OH-)?

• Positive

• Negative

• Neutral

• Variable

What type of bond is formed between NH4+ and OH- in NH4OH?

• Covalent bond

• Hydrogen bond

• Ionic bond

• Metallic bond

What is the significance of brackets in the Lewis structure of ions?

• They highlight the central atom.

• They represent the type of bond.

• They show the charge of the ion.

• They indicate the number of atoms.

Why is NH4OH considered an ionic compound?

• It contains only covalent bonds.

• It has a high melting point.

• It is made up of ions with opposite charges.

• It is a metal compound.