A sample of ore is found to be 0.0015% silver and
0.034 % copper. What is the percentage of matter in the
that is neither silver nor copper? Round your answer to the nearest ten thousandth.

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.