One 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? atomic number

atomic mass

chemical properties

is there multiple choice answers?

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

dynamic equilibrium is the answer.