The tin and zinc contents of a brass sample are analyzed with the following results: (a) Zn: 33.27, 33.37, and 33.34%

(b) Sn: 0.022, 0.025, and 0.026%

Calculate the standard deviation and the coefficient of variation (relative standard

deviation) for the analysis.​

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;

So the main goal for the elements is stability which is a complete/full valence shell and typically the magic number for a stable element is 8 valence electron but not always. so elements to the left of the periodic table tend to be way less stable then those on the right, so the elements on the left are much more reactive.