How do you use the periodic table to find the matter, number of subatomic particles, family name, reactivity, and number of valence electrons?

U need to look at the numbers which determine the reactivity.

Of course: ) what’s your name ?

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.