3. Which of the following is true of unsaturated fats? a. They are more common in animals than in plants.
b. They have double bonds in the carbon chains of their fatty
acids.
c. They generally solidify at room temperature.
d. They contain more hydrogen than do saturated fats having
the same number of carbon atoms.

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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.