Which of the following is true about organic molecules? a) They can only be found in living organisms.
b) They must contain carbon.
c) None of the above
d) They always have chains of carbon atoms.
e) They contain only carbon.

D

Explanation:

gold is my favorite solid.

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.