Ammonium Phosphide and Ionic Compounds

The video explores whether NH4₃P, ammonium phosphide, is ionic or covalent. Despite being composed of nonmetals, it forms an ionic compound due to the presence of the ammonium ion (NH4⁺), a polyatomic ion with a positive charge. This ion combines with phosphorus, which has a 3- charge, resulting in an ionic bond. The video emphasizes the importance of recognizing the ammonium ion's role in forming ionic compounds with nonmetals.

What elements are present in ammonium phosphide?

• Nitrogen, Hydrogen, and Phosphorus

• Oxygen, Hydrogen, and Sulfur

• Carbon, Nitrogen, and Oxygen

• Sulfur, Phosphorus, and Chlorine

Why is ammonium phosphide not considered a covalent compound?

• Because it contains metals

• Because it is composed of nonmetals

• Because it contains a polyatomic ion

• Because it is a gas at room temperature

What is the charge of the ammonium ion (NH4⁺)?

• 0

• 3-

• 1+

• 2+

What is the ionic charge of phosphorus in ammonium phosphide?

• 4+

• 3-

• 2-

• 1+

How many ammonium ions are needed to balance the charge of one phosphorus ion in ammonium phosphide?

• Four

• Two

• One

• Three

What type of bond is formed between the ammonium ion and phosphorus in ammonium phosphide?

• Metallic bond

• Hydrogen bond

• Covalent bond

• Ionic bond

What should you memorize about the ammonium ion?

• It forms covalent compounds with metals

• It forms ionic compounds with nonmetals

• It is always neutral

• It is a gas at room temperature