Ionic Compounds and Their Properties

The video tutorial explains how to write the Lewis structure for magnesium oxide (MgO). It begins by identifying magnesium as a metal and oxygen as a non-metal, forming an ionic compound. The tutorial uses the periodic table to determine the valence electrons of magnesium and oxygen. Magnesium, with two valence electrons, transfers them to oxygen, resulting in a two-plus charge for magnesium and a two-minus charge for oxygen. This electron transfer creates an ionic bond between the two elements. The video also demonstrates how to represent this bond using Lewis structures, including the use of brackets to indicate ions. The tutorial concludes by noting that this representation is a formula unit, part of a larger crystal structure.

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

• Ionic compound

• Covalent compound

• Molecular compound

• Metallic compound

How many valence electrons does magnesium have?

• 1

• 6

• 2

• 4

In which group of the periodic table is oxygen found?

• Group 1

• Group 16

• Group 2

• Group 18

What happens to magnesium's electrons during the formation of MgO?

• They are lost to the environment.

• They are shared with oxygen.

• They are transferred to oxygen.

• They remain with magnesium.

What charge does magnesium acquire after losing electrons in MgO?

• 1-

• 2+

• 1+

• 2-

What is the significance of the charges on the ions in MgO?

• They affect the melting point of the compound.

• They show the attraction between ions.

• They indicate the strength of the covalent bond.

• They determine the color of the compound.

Why are brackets used around the ions in the Lewis structure of MgO?

• To highlight the valence electrons

• To show the ionic nature

• To indicate the number of atoms

• To denote the molecular weight

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

• A unit of measurement

• A type of covalent bond

• A repeating unit in a crystal

• A single molecule