Question

the element krypton is a gas that shows almost no chemical activity. to find another element with similar properties, what should a student look for on the periodic table of the elements?

an element in the same group
an element in the same period
an element with the same net charge
an element with the same atomic mass

Explanation:

Elements in the same group of the periodic table have the same number of valence electrons, which leads to similar chemical properties. Krypton is a noble - gas, and other noble - gases in its group will have similar low chemical activity.

Answer:

an element in the same group