Sketch the key components of a ph combination electrode and very briefly describe in your own words how it works and how does one use it to determine the ph of a solution. (4) give the reaction that relates the cell potential to the ph of a solution. do you expect an increase in the ph of a solution to result in an increase or decrease in the measured cell potential. (5) sketch the curve that describes the relationship of the cell potential to the ph of a solution in potentiometric measurement. label your axes correctly for credit. (6) sketch the titration curve of a polyprotic acid with a strong base and identify on your graph regions/values such as the buffer regions, pka values, volumes at equivalence point..etc.

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.