What is unique about how the periodic table of the elements is organized?

Question

A. Elements are in order according to the number of neutrons in their nucleus.
B. Elements are in order so that each element has an atomic mass that is 1 greater than the previous element.
C. Elements with similar properties are grouped together in a pattern.
D. Elements are grouped by multiples of atomic number.

Answer 1

The correct answer is C. Elements with similar properties are grouped together in a pattern.

The periodic table is organized primarily by increasing atomic number (the number of protons in an atom's nucleus), and elements are arranged in rows (periods) and columns (groups or families) such that those in the same column share similar chemical properties. This organization reflects periodic trends in elemental behavior.