The atomic number of barium is 56 what do you know about the subatomic particles in an atom of this element

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

If two objects at different te,peraure are in contact with each other what happens to their temperature