I need help on chemistry.

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.