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?

Explanation:

Step1: Recall element properties

Metals are good conductors of electricity. Chromium, calcium, and osmium are metals. Iodine is a non - metal and carbon is also a non - metal (in most of its common forms). Non - metals are generally poor conductors of electricity.

Step2: Consider reactivity trends

Noble gases are the least reactive elements. But among the given elements, we consider their general reactivity. Iodine and carbon are less reactive compared to some metals in certain contexts.

Step3: Think about highly reactive metals

Alkali metals are highly reactive and are stored in oil to prevent reaction with air and water. Calcium is a reactive metal but not as reactive as alkali metals in general. Some alkali metals are not in the list, but among the given elements, calcium is relatively reactive and is sometimes stored in oil to prevent reaction with air and moisture.

Answer:

• Which element below is least reactive? Iodine (assuming no noble gases are in the list)
• Which element below must be stored in oil because of its reactivity? Calcium