Iron III Phosphide Concepts

The video tutorial explains how to write the formula for iron III phosphide by using the periodic table to identify the element symbols for iron (Fe) and phosphorus (P). It describes the formation of ionic compounds, highlighting the need to balance the charges of iron, a transition metal with a 3+ charge, and phosphide, with a 3- charge, to achieve a neutral compound. The tutorial concludes with the final formula for iron III phosphide, FeP.

What is the element symbol for iron as found on the periodic table?

• I

• Fe

• In

• Ir

Why is iron III phosphide considered an ionic compound?

• It is composed of two metals.

• It is composed of a metal and a non-metal.

• It is composed of two non-metals.

• It is composed of a noble gas and a metal.

What does the Roman numeral III indicate in iron III phosphide?

• The number of phosphorus atoms.

• The atomic number of iron.

• The number of iron atoms.

• The charge of the iron ion.

What is the charge of the phosphorus ion in iron III phosphide?

• 1+

• 3-

• 2-

• 3+

What is the net charge of iron III phosphide?

• 3+

• 1+

• 0

• 3-

What is the correct formula for iron III phosphide?

• FeP3

• FeP

• Fe3P2

• Fe2P3