Lead(II) Phosphide Concepts

The video tutorial explains how to write the chemical formula for lead(II) phosphide. It begins by identifying the symbols and charges for lead and phosphorus. Lead is denoted as Pb with a 2+ charge, and phosphorus as P with a 3- charge. The tutorial uses the crisscross method to balance these charges, resulting in the formula Pb3P2. The video concludes by verifying the formula to ensure a net charge of zero, confirming the correctness of the derived formula.

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

• The atomic mass of lead

• The charge of the lead ion

• The number of lead atoms

• The number of phosphorus atoms

Which group in the periodic table does phosphorus belong to?

• Group 3

• Group 7

• Group 5A or 15

• Group 1

What is the charge of a phosphide ion?

• 3+

• 2+

• 3-

• 2-

What method is used to balance the charges in lead(II) phosphide?

• The elimination method

• The substitution method

• The crisscross method

• The balancing method

What is the correct formula for lead(II) phosphide?

• Pb2P3

• Pb3P2

• Pb2P

• PbP2

How do you verify that the formula for lead(II) phosphide is correct?

• By checking the atomic mass

• By ensuring the net charge is zero

• By counting the number of atoms

• By comparing with other compounds