Walter gets a paper back in lab with “-2.75% error” written on it. He had found the mass of an object to be 100.7 grams. What should he have found as the mass of the object

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

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.