Ionic Compounds and Electron Transfer

The video tutorial explains how to write the Lewis structure for potassium bromide (KBr). It begins by identifying potassium as a metal and bromine as a non-metal, forming an ionic compound. The tutorial details the transfer of valence electrons from potassium to bromine, resulting in a positive potassium ion and a negative bromine ion. This electron transfer leads to the formation of an ionic bond. The video also demonstrates how to represent this structure using brackets and discusses the concept of a formula unit, highlighting the stability achieved by completing the bromine's octet.

What type of compound is formed when a metal and a non-metal combine?

• Covalent compound

• Metallic compound

• Molecular compound

• Ionic compound

How many valence electrons does potassium have?

• One

• Two

• Seven

• Eight

In an ionic compound, what happens to the valence electrons?

• They remain with the metal

• They are transferred from metal to non-metal

• They are shared equally

• They are transferred from non-metal to metal

What charge does potassium have after losing an electron?

• Neutral

• Negative

• Double negative

• Positive

Why do opposite charges attract in ionic bonds?

• Because they have the same charge

• Because they are both negative

• Because they have different charges

• Because they are both positive

How are ionic bonds represented in Lewis structures?

• With lines between atoms

• With dots around atoms

• With arrows between atoms

• With brackets around ions

What is the purpose of using brackets in the Lewis structure of ionic compounds?

• To represent the molecular shape

• To highlight the transfer of electrons

• To indicate the number of atoms

• To show shared electrons

What is a formula unit in the context of ionic compounds?

• A pair of covalently bonded atoms

• A repeating group of atoms

• A single atom

• A single molecule

What does the transfer of electrons achieve for bromine in KBr?

• It makes bromine unstable

• It increases bromine's atomic number

• It reduces bromine's charge

• It completes bromine's octet