Question

use the periodic table to select the element that best fits each of the following descriptions. noble gas: oxygen chlorine krypton complete a group 5a element: actinium arsenic rhenium done

Explanation:

Noble gases are in group 18 of the periodic table. Krypton is a noble gas. Group 5A elements have 5 valence - electrons. Arsenic is in group 5A. Actinium is an actinide and rhenium is in group 7B.

Answer:

Noble gas: krypton
A group 5A element: arsenic