Identify each of the following elements as a metal, a nonmetal, or a metalloid:e. located in Group 8A (18)

Verified step by step guidance

1. Identify the element located in Group 8A (18) of the periodic table. This group is known as the noble gases.
2. Recall that noble gases are a group of elements that are characterized by their lack of reactivity due to having a full valence shell of electrons.
3. Understand that noble gases are nonmetals. They are not metals or metalloids.
4. Conclude that any element located in Group 8A (18) is classified as a nonmetal.
5. Therefore, the element located in Group 8A (18) is a nonmetal.

Key Concepts

Periodic Table Groups

The periodic table is organized into columns called groups, which categorize elements based on similar properties. Group 8A (or Group 18) is known as the noble gases, which are characterized by their full valence electron shells, making them largely unreactive. Understanding the group placement helps in identifying the elemental properties.

Metals, Nonmetals, and Metalloids

Elements are classified as metals, nonmetals, or metalloids based on their physical and chemical properties. Metals are typically conductive, malleable, and ductile, while nonmetals are generally poor conductors and more brittle. Metalloids exhibit properties of both metals and nonmetals, making this classification essential for understanding element behavior.

Noble Gases

Noble gases, found in Group 8A (18), include helium, neon, argon, krypton, xenon, and radon. These gases are characterized by their lack of reactivity due to having a complete outer electron shell. This unique property distinguishes them from other elements and is crucial for understanding their role in chemical reactions.