What is the relatioship between atomic numbers and ionic radii of the elements in group 1? what is the relationship between atomic numbers and first ionization energies? the following are the elements in the group 1 in the periodic table lithium, sodium, potassium, cesiumand rubidium

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.