1. Describe the components of the colorimeter/multimeter and how it works. 2. Describe how electrical resistance readings from a colorimeter/multimeter can be used to explain the relationship between concentration and absorbance.

explanation:

i think option no d is the correct answer

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.