Question

type the charge of the transition metal, then type the name of each compound.
pbo₂
pb
?
o₂²-
the name of this chemical is:
(remember to include the roman numeral)
cun
cu
?
n³-
the name of this chemical is:
(remember to include the roman numeral)

Explanation:

Step1: Determine the charge of Pb in PbO₂

In PbO₂, oxygen (O) has a charge of - 2. Let the charge of Pb be \(x\).
Using the formula for the charge of a compound (sum of charges = 0), for PbO₂: \(x+2\times(-2)=0\).
Solving for \(x\): \(x - 4=0\), so \(x = +4\).
The name of PbO₂ is lead(IV) oxide.

Step2: Determine the charge of Cu in CuN

In CuN, nitrogen (N) has a charge of - 3. Let the charge of Cu be \(y\).
Using the formula for the charge of a compound (sum of charges = 0), for CuN: \(y+(-3)=0\).
Solving for \(y\): \(y=+3\).
The name of CuN is copper(III) nitride.

Answer:

For PbO₂: Charge of Pb is \(+4\), name is lead(IV) oxide.
For CuN: Charge of Cu is \(+3\), name is copper(III) nitride.