Group 8A (also referred to as Group 18) elements on the periodic table share which characteristics?
Check all that apply.
A. Nonreactive
B. Noble gases
C. Inert
D. Metals
The Correct Answer and Explanation is:
The elements in Group 8A of the periodic table are also referred to as Group 18 elements. These elements include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). They share several key characteristics, which are fundamental to understanding their behavior in chemical reactions and their place on the periodic table. Let’s examine each option to see which characteristics apply to these elements.
A. Nonreactive
Group 18 elements are indeed nonreactive under normal conditions. This characteristic is due to the fact that these elements have a full valence electron shell, making them chemically stable. They do not readily form chemical bonds with other elements because they have no need to gain, lose, or share electrons. This lack of reactivity is one of their most defining features.
B. Noble gases
Group 18 elements are also known as noble gases. The term “noble” refers to the fact that these elements are chemically inert or “noble” because they do not easily combine with other elements to form compounds. This property stems from their full valence electron shells, which give them stability.
C. Inert
The term inert is often used to describe Group 18 elements, and it is accurate in this context. Inert means “unreactive,” and as mentioned earlier, these elements are chemically stable and do not readily form bonds or react with other elements due to their full electron shells. The inert nature of these gases is a direct result of their electronic configuration.
D. Metals
This characteristic does not apply to Group 18 elements. Group 18 consists of nonmetals, not metals. Noble gases are all nonmetals, characterized by being gases at room temperature, having low boiling points, and being poor conductors of electricity.
Conclusion
Therefore, the correct characteristics of Group 8A (18) elements are:
- A. Nonreactive
- B. Noble gases
- C. Inert
These elements are nonmetals that are chemically stable, unreactive, and often referred to as noble gases due to their low reactivity.