Final answer:
The noble gas that is not listed is Be.
Step-by-step explanation:
The correct answer is d. Be.
A noble gas is an element in Group 18 of the periodic table. These elements have full valence electron shells and are very stable, which makes them less likely to form chemical bonds with other elements. Examples of noble gases include He (helium), Ne (neon), and Xe (xenon).
Be (beryllium) is not a noble gas. It is located in Group 2 of the periodic table and has only two valence electrons. Therefore, the correct answer to the question is option d. Be.
Learn more about Noble Gases