Wyckoff was formed as a township by an act of the New Jersey Legislature on November 2, 1926, replacing Franklin Township, based on the results of a referendum held that day. Portions of Wyckoff were ceded to Midland Park based on the results of a referendum held on June 9, 1931.
The IV in lead IV oxide means that the lead ion has a 4+ charge. The oxide ion has a 2- charge. The charges must cancel out to zero, so there are 2 oxide ions for every 1 lead â¦ IV ion, which is what the formula PbO2 shows.
To get the molecular formula or ionic formula in this case, you need to know the valencies of the elements constituting that compound. For instance here, Magnesium has valency 2, Oxygen has valency 2, so $\ce{MgO}$ is the formula for Magnesium Oxide. For example, Sodium Oxide, Sodium has valency 1, Oxygen has valency 2, so $\ce{Na_2O}$ is the formula for Sodium Oxide. Iron (III) Oxide becomes: $\ce{Fe_2O_3}$ (Iron valency = 3; Oxygen valency = 2).