Ionic and Covalent Compounds Concepts

The video explores whether NH4F is ionic or covalent. Initially, it seems covalent due to its non-metal components: nitrogen, hydrogen, and fluorine. However, NH4F is an exception because it contains the ammonium ion (NH4+), a polyatomic ion with a positive charge. The fluoride ion (F-) has a negative charge, and the attraction between these opposite charges forms an ionic bond, making NH4F an ionic compound.

What type of elements are involved in NH4F?

• Metals only

• Non-metals only

• Metalloids only

• Metals and non-metals

What is the typical expectation for compounds made of only non-metals?

• They are ionic compounds

• They are metallic compounds

• They are covalent compounds

• They are alloys

What is the charge of the ammonium ion in NH4F?

• Negative

• Variable

• Neutral

• Positive

How many hydrogen atoms are bonded to the nitrogen in the ammonium ion?

• Five

• Two

• Three

• Four

What is the charge of the fluoride ion in NH4F?

• 2-

• 2+

• 1+

• 1-

What type of bond is formed between the ammonium ion and the fluoride ion in NH4F?

• Covalent bond

• Hydrogen bond

• Ionic bond

• Metallic bond