Silver Phosphide and Ionic Charges

The video tutorial explains how to write the chemical formula for silver phosphide. It begins by identifying the element symbols for silver (Ag) and phosphide (P), and then discusses the charges of these ions. Silver, a transition metal, typically has a +1 charge, while phosphide, derived from phosphorus in group 15, has a -3 charge. To form a neutral compound, three silver ions are needed to balance one phosphide ion, resulting in the formula Ag3P. The video also covers naming conventions, noting that while it can be called silver(I) phosphide, it is often simply referred to as silver phosphide.

What is the element symbol for silver?

• Au

• Si

• Ag

• Pb

Which group does phosphorus belong to, and what charge does its ion typically have?

• Group 15, 3-

• Group 16, 2-

• Group 13, 3+

• Group 14, 4-

What is the common ionic charge of silver in compounds?

• 2+

• 0

• 1+

• 3+

How many silver ions are needed to balance one phosphide ion in silver phosphide?

• One

• Two

• Three

• Four

What is the chemical formula for silver phosphide?

• Ag3P

• Ag2P

• AgP

• Ag4P

Why might someone refer to silver phosphide as 'silver one phosphide'?

• Because it is a common naming error

• Because phosphorus has a 3+ charge

• Because silver has a 1+ charge

• Because silver has a 2+ charge

Is it necessary to specify the charge of silver in the name of silver phosphide?

• Yes, always

• No, because silver is usually 1+

• Yes, because it varies

• No, because phosphorus is more important