Question

How find the valency of a) cadmium b) iridium c) neptunium and d) rutherfordium PLSS HELP TMRW SCIENCE XAM

Answer 1

The use of iridium as a permanent modifier for the determination of lead and cadmium in marine sediment and biological tissues by furnace atomization plasma emission spectrometry (FAPES) was evaluated. The Ir coating procedure, atomization conditions and FAPES parameters were optimized for best analytical response and minimum background signal. Good precision (less than 3% RSD) can be achieved with the proposed method. Certified Reference Materials from the National Research Council of Canada were analyzed to verify the accuracy of this technique. Matrix interference was compensated for by the use of standard additions calibration and good agreement was achieved between found and certified values. Detection limits of 3.8 ng g−1 for Pb and 4.0 ng g−1 for Cd in MESS-3 and PACS-2 marine sediment and 4.1ng g−1 for Pb and 2.2 ng g−1 for Cd in DOLT-2 and TORT-2 biological tissues were o

Answer 2

so the thing is that to find the valency of iridium the thing that is necessary is that you see the periodic table where is it after finding its atomic number that is 77 we can easily calculate its valency as per bihr bury scheme. we know that there should be 2 8 18 and 32 electrons but the thing is that the outermost shell of element can have less than or equal to 8 electrons. the atomic number should be divided in such manner like 2,8,8,8,8,8,8,8,8,8 after this we will have 3 left so that goes to the outermost shell so what is the valency of iridium its 3