Question

use the periodic table to select the element that best fits each of the following descriptions. which elements likely conduct electricity well? check all that apply. chromium iodine carbon calcium osmium which element below is least reactive? which element below must be stored in oil because of its reactivity? done complete

Explanation:

Step1: Recall conductivity properties

Metals are good conductors of electricity. Chromium, calcium, and osmium are metals among the given elements. Iodine is a non - metal and carbon can be in non - metallic forms (like graphite which conducts to some extent but not as well as metals in general), but chromium, calcium, and osmium are likely good conductors.

Step2: Recall reactivity of noble gases and alkali metals

Noble gases are very unreactive. Among common elements in general knowledge, if we assume common choices, noble gases are not in the list here. But among the given elements, iodine is a halogen and less reactive compared to some metals in terms of single - element reactivity in some contexts.

Step3: Recall highly reactive metals

Alkali metals are highly reactive and are stored in oil to prevent reaction with air and moisture. Calcium is a reactive metal and is sometimes stored in oil due to its reactivity.

Answer:

Which element below is least reactive? Iodine
Which element below must be stored in oil because of its reactivity? Calcium