The mean absolute deviation is the average of the positive distances of each point from the mean. The larger the MAD, the greater variability there is in the data (the data is more spread out). The MAD helps determine whether the set's mean is a useful indicator of the values within the set.
95 - 98+. Although Potassium only has two stable isotopes (K-39 and K-41), the long-lived radioisotope K-40 is often also regarded as a stable isotope. Potassium Isotopes, mainly K-40 and K-41, are used to study the impact of potassium on the growth of plants and of the human cardiovascular system.
Potassium oxide (K2 O) is an ionic compound of potassium and oxygen. This pale yellow solid, the simplest oxide of potassium, is a rarely encountered, highly reactive compound.Some materials of commerce, such as fertilizers and cements, are assayed assuming the percent composition that would be equivalent to K 2 O.otassium oxide is produced from the reaction of oxygen and potassium; this reaction affords potassium oxide, K 2 O. Treatment of the peroxide with potassium produces the oxide: