Ionic Compounds and Lewis Structures

This video tutorial explains how to write the Lewis structure for lithium sulfide (Li2S). It covers the concept of valence electrons, the ionic bond formation between lithium and sulfur, and the electron transfer process. The video also discusses the representation of the Lewis structure and the concept of formula units in the crystal structure of Li2S.

What type of compound is formed when lithium and sulfur combine?

• Molecular compound

• Covalent compound

• Ionic compound

• Metallic compound

Where is sulfur placed in the Lewis structure of Li2S?

• Above lithium

• In the middle

• On the right side

• On the left side

How many valence electrons does lithium have?

• Four

• Two

• One

• Three

What happens to lithium's charge after it transfers an electron to sulfur?

• It becomes 1-

• It becomes neutral

• It becomes 2+

• It becomes 1+

How many electrons does sulfur gain in the formation of Li2S?

• One

• Two

• Four

• Three

What is the charge on the sulfide ion in Li2S?

• 1+

• 1-

• 2-

• 2+

What is the purpose of using brackets in the Lewis structure of Li2S?

• To indicate the number of atoms

• To show the charge of ions

• To separate different elements

• To highlight the central atom

What does the term 'formula unit' refer to in the context of Li2S?

• A single molecule

• A repeating pattern in a crystal

• A covalent bond

• An isolated atom