Question

marie discovers boxes of elements in a storage room. the boxes do not say which elements they contain, but they do have information about their locations on the periodic table. what kind of information would allow marie to determine which boxes contain the most reactive elements?

Explanation:

Reactivity of elements is governed by their position on the periodic table. The most reactive metals are in Group 1 (alkali metals, far left, excluding hydrogen), and the most reactive nonmetals are in Group 17 (halogens, far right). Knowing an element's group (and period, for metals where reactivity increases down Group 1) allows identification of the most reactive elements.

Answer:

Information about the elements' group (and period, for metals) on the periodic table. Specifically, elements in Group 1 (alkali metals, excluding hydrogen) are the most reactive metals, and elements in Group 17 (halogens) are the most reactive nonmetals; for Group 1, reactivity increases as you move down the period.