Radioactivity is the disintegration of an atomic nucleus that releases energy to become stable * a. Extraordinary

b. Normal

c. Ordinary

d. Spontaneous​

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.

How are isotopes of the same chemical element alike? how are they different?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.