Naming and Charges of Phosphide Compounds

The video tutorial explains how to name the compound Mn3P4. It begins by identifying manganese as a transition metal and phosphorus as a nonmetal. The tutorial outlines the steps to name the metal and nonmetal using the periodic table, replacing the ending of phosphorus with 'ide' to form phosphide. It then calculates the charge of the compound, explaining the need for a Roman numeral to indicate the charge of manganese. The final name is determined to be manganese(IV) phosphide, with an explanation of how to deduce the formula from the name.

What type of metal is manganese in Mn3P4?

• Alkali metal

• Noble gas

• Transition metal

• Alkaline earth metal

What is the first step in naming Mn3P4?

• Change the suffix of the nonmetal

• Identify the nonmetal

• Write the name of the metal as it appears on the periodic table

• Determine the charge of the metal

How do you modify the suffix of phosphorus when naming Mn3P4?

• Change 'phosphorus' to 'phosphite'

• Change 'phosphorus' to 'phosphide'

• Change 'phosphorus' to 'phosphate'

• Change 'phosphorus' to 'phosphorate'

What is the charge of the phosphide ion in Mn3P4?

• 3-

• 2-

• 1-

• 4-

How many phosphide ions are present in Mn3P4?

• 2

• 3

• 4

• 5

What is the total negative charge contributed by phosphide ions in Mn3P4?

• 9-

• 6-

• 15-

• 12-

What Roman numeral is used in the name of Mn3P4 to indicate the charge of manganese?

• II

• III

• IV

• V

If given the name manganese(IV) phosphide, what would be the charge of manganese?

• 5+

• 2+

• 3+

• 4+