Which absorbance wavelength is responsible for the observed purple color? 2) What purpose does the base serve in this reaction? What is the name of the intermediate that it generates? Can this reaction proceed without adding base? 3) Suppose instead of using dibenzylacetone we used benzophenone. Would this reaction work? Why or why not. 4) This reaction was carried out in ethanol. Provide a specific reason why this experiment would not work well if carried out in hexanes.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.