Ionic Compounds and Electron Transfer

This video tutorial explains how to write the Lewis structure for lithium phosphide (Li3P). It begins by identifying Li3P as an ionic compound, with lithium transferring its valence electrons to phosphorus. The tutorial demonstrates drawing lithium and phosphorus atoms, showing electron transfer to achieve a stable octet for phosphorus. It discusses the resulting ionic charges and the formation of an ionic bond. The video concludes by explaining the concept of a formula unit and how it relates to the crystal structure of solid Li3P.

What type of compound is Li3P?

• Ionic

• Covalent

• Molecular

• Metallic

How many valence electrons does a lithium atom have?

• Three

• Two

• One

• Four

In which group is phosphorus found on the periodic table?

• Group 1

• Group 3

• Group 5A

• Group 7

What is the purpose of transferring electrons from lithium to phosphorus?

• To increase atomic mass

• To change the element

• To form a covalent bond

• To achieve a stable octet

How many electrons does phosphorus gain to complete its octet?

• One

• Two

• Three

• Four

What charge does phosphorus have after gaining electrons?

• 3+

• 2-

• 3-

• 1+

What is the charge on each lithium ion after losing an electron?

• 2-

• 1-

• 2+

• 1+

Why are brackets used around the phosphorus atom in the Lewis structure?

• To highlight the transfer of electrons

• To denote it is an ionic compound

• To indicate a covalent bond

• To show it is a positive ion

What is a formula unit in the context of Li3P?

• An isolated atom

• A repeating pattern in a crystal

• A single molecule

• A covalent bond

What does the solid structure of Li3P consist of?

• Individual atoms

• Molecular pairs

• Formula units in a crystal

• Covalent networks