How many atoms are in 2NaCHO2

D. most models represent a real world object in a simpler way

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Its trait is different and it the organism survive