How understanding of the periodicity and groupings is useful:

explain the interaction of the group or chemical element you have highlighted with a moral, ethical, social, economic, political, cultural or environmental factor as a result of its use.

choose one factor ~ and one group or element~

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Which type of fossil does this image depict?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.