Advanced Placement (AP) Chemistry Practice Exam

Question: 1 / 400

Which group of elements is known as noble gases?

Elements in Group 17 of the periodic table

Elements in Group 16 of the periodic table

Elements in Group 14 of the periodic table

Elements in Group 18 of the periodic table

The noble gases are found in Group 18 of the periodic table. These elements include helium, neon, argon, krypton, xenon, and radon. They are characterized by their lack of reactivity due to having a full valence shell of electrons. This complete outer shell makes them stable, which is why they are often referred to as "inert gases."

In contrast, elements found in other groups, such as Group 17 (the halogens), Group 16 (the chalcogens), and Group 14 (the carbon group), are generally more reactive. These groups have incomplete valence shells and tend to form various compounds by gaining, losing, or sharing electrons to achieve a stable electron configuration. Therefore, the unique properties of noble gases set them apart from elements in these other groups.

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