How are elements arranged on the periodic table? A) They are arranged to highlight different elements with similar isotopes. B) They are arranged in order from most abundant to very rare and unstable. C) They are arranged to highlight similarities between different elements. D) They are arranged in order of the date of discovery.

Answer: C) They are arranged to highlight similarities between different elements.

Explanation: The periodic table organizes elements based on their atomic number (number of protons) and groups elements with similar chemical properties into columns (groups or families). This arrangement allows for the identification of trends and similarities in behavior among elements, such as reactivity and valence electron configurations.