Question

how are elements arranged on the periodic table? (1 point)
they are arranged to highlight different elements with similar isotopes.
they are arranged in order from most abundant to very rare and unstable.
they are arranged in order of the date of discovery.
they are arranged to highlight similarities between different elements.

Explanation:

The periodic table arranges elements in periods (rows) and groups (columns) to show trends and similarities in their chemical and physical properties. Elements in the same group have similar outer - electron configurations and thus similar chemical behavior.

Answer:

They are arranged to highlight similarities between different elements.