Ionic Compounds and Lewis Structures

The video tutorial explains how to write the Lewis structure for sodium phosphate (Na3PO4). It begins by identifying Na3PO4 as an ionic compound composed of a metal and non-metals. The tutorial then focuses on the phosphate ion, highlighting its polyatomic nature and ionic charge of three minus. The sodium ions, each with a charge of one plus, are also discussed. The video guides viewers through drawing the Lewis structure, emphasizing the use of brackets to indicate the ionic nature of the compound. The tutorial concludes with the complete Lewis structure for sodium phosphate.

What type of compound is Na3PO4?

• Metallic compound

• Ionic compound

• Molecular compound

• Covalent compound

What is the charge of the phosphate ion in Na3PO4?

• 0

• 2-

• 1+

• 3-

How many extra electrons does the phosphate ion have?

• Four

• Three

• One

• Two

What is the ionic charge of a sodium ion in Na3PO4?

• 3+

• 2+

• 0

• 1+

Why are brackets used around the phosphate ion in the Lewis structure?

• To indicate shared electrons

• To show the ionic charge

• To separate it from sodium ions

• To highlight the central atom

How many sodium ions are present in the Lewis structure of Na3PO4?

• Three

• Two

• Four

• One

What happens to sodium ions in the structure of Na3PO4?

• They gain electrons

• They lose electrons

• They remain neutral

• They form covalent bonds

What is the net charge of the entire Na3PO4 compound?

• 3+

• 0

• 2-

• 1+

In the Lewis structure of Na3PO4, what is the role of sodium ions?

• To provide electrons to phosphate

• To form covalent bonds with phosphate

• To balance the charge of phosphate

• To act as a central atom

What is a common representation practice for positive ions in the Lewis structure of Na3PO4?

• Placing them inside brackets

• Leaving them unmarked

• Drawing them with a negative sign

• Connecting them with lines