Aspirin is a common headache treatment, and it needs to dissolve into the blood to work on a person. Which will work faster, aspirin tablets or aspirin powder? Why?

the answer is c.the valence of the atoms combine .

4d^55s^1 ( third choice)

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.