What is the oxidation number of each element in the permanganate ion, MnO4- ?

CaBr2 reacts with F2 via the following equation: F2 + CaBr2 

The cyanate ion (NCO-) has three possible Lewis Structures: Which of these Lewis Structures is/are the most favorable?

What is the molecular geometry (MG) of a molecule that has an octahedral electron domain geometry (EDG) with two lone pairs of electrons on the central atom?

What is the name of the compound, NH4SCN?

The element Michellium (Mi) does not exist. But if it did, it would have the following isotopic abundances: Isotope Atomic Mass  % Natural Abundance  83Mi      83.14 amu    14.6 %  83Mi      84.92 amu   Assuming that Michellium only has two naturally-occurring isotopes, what is the atomic weight of Michellium?

Which of the following species has the largest ionic radius?

A sample of iron absorbs 67.5 J of heat, upon which the temperature of the sample increases from 21.5ºC to 28.5 ºC. If the specific heat of iron is 0.450 J/gK, what is the mass of the sample?

What is the empirical formula for the compound that contains 49.4 % K, 20.3% S, and 30.3 % O by mass?

Arrange the following three substances: NO+, NO2-, and NO3- in order of decreasing (largest to smallest) N-O bond length.