How many grams of cesium fluoride would be required to make 73.1 g of cesium xenon heptaflouride?

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory