Ions and Chemical Formulas

The video tutorial explains how to write the formula for ammonium chloride. It begins by introducing ammonium as a polyatomic ion, NH4+, and describes its positive charge. The chloride ion, Cl-, is then discussed, highlighting its negative charge. The video demonstrates how these ions combine to form ammonium chloride, NH4Cl, with a net charge of zero. It also explains the ionic bond between NH4+ and Cl-, and the covalent bonds within the ammonium ion. The tutorial concludes with a summary of the bonding characteristics in ammonium chloride.

What type of ion is ammonium?

• A polyatomic ion

• A single element

• A metal

• A noble gas

What is the chemical formula for the ammonium ion?

• NH4-

• NH3

• NH4+

• NH2-

How many hydrogen atoms are present in the ammonium ion?

• Five

• Four

• Two

• Three

Where is chlorine found on the periodic table?

• Group 1

• Group 7A or 17

• Group 8A or 18

• Group 2

What is the charge of the chloride ion?

• 1-

• 2+

• 2-

• 1+

What is the net charge of ammonium chloride?

• 2+

• 1-

• 1+

• 0

What is the chemical formula for ammonium chloride?

• NH3Cl

• NH4Cl

• NH3Cl2

• NH4Cl2

What type of bond exists between the ammonium and chloride ions?

• Metallic bond

• Hydrogen bond

• Ionic bond

• Covalent bond

Within the ammonium ion, how are the hydrogens bonded to nitrogen?

• Ionic bond

• Metallic bond

• Covalent bond

• Van der Waals forces