Lead Compounds and Ionic Charges

The video tutorial explains how to write the chemical formula for lead(II) sulfide (PbS). It begins by identifying lead as a metal and sulfide as a non-metal, forming an ionic compound. The Roman numeral 'II' indicates the charge of lead, which is 2+. Sulfide, derived from sulfur, has a 2- charge. The tutorial discusses the importance of understanding ionic charges and how they balance out in the compound. Finally, it demonstrates writing the formula PbS, where the charges cancel each other out.

What type of compound is formed between lead and sulfide?

• Covalent compound

• Molecular compound

• Ionic compound

• Metallic compound

What does the Roman numeral in lead(II) sulfide indicate?

• The charge of the lead ion

• The number of lead atoms

• The atomic mass of lead

• The number of sulfide ions

Which group in the periodic table contains elements with a 2- charge?

• Halogens

• Chalcogens

• Noble gases

• Alkali metals

What is the ionic charge of sulfur in sulfide?

• 1-

• 2+

• 1+

• 2-

How do the charges of lead and sulfide ions balance in lead(II) sulfide?

• Lead is 1+ and sulfide is 1-

• Lead is 3+ and sulfide is 3-

• Lead is 4+ and sulfide is 4-

• Lead is 2+ and sulfide is 2-

What is the chemical formula for lead(II) sulfide?

• PbS2

• Pb2S

• PbS

• PbSO4

What would be the formula if sulfide was replaced by sulfate?

• PbSO3

• PbSO4

• PbS2O4

• Pb2SO4