The periodic table is called “periodic” because it is arranged to show repeating patterns. what is one of those repeating patterns?
a. atomic mass
b. atomic number
c. number of protons
d. number of valence electrons

A. atomic mass

Explanation:

Periodic Properties of the Elements Mendeleev saw that when the elements were arranged in order of increasing atomic mass, those that had similar properties occurred in a repeating pattern. That is, the pattern was periodic. Periodic means “happening at regular intervals.” Hope this helps!!

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.