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. Step 1: Understand the periodic table grouping. Group 8A (or Group 18) is also known as the noble gases. These elements are located in the far-right column of the periodic table.
2. Step 2: Recall the properties of noble gases. Noble gases are characterized by their lack of reactivity due to having a full valence electron shell. They are nonmetals.
3. Step 3: Identify the elements in Group 8A. The elements in this group include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
4. Step 4: Classify the elements. Since all noble gases share similar chemical properties and are nonmetals, each element in Group 8A is classified as a nonmetal.
5. Step 5: Conclude that any element located in Group 8A (18) is a nonmetal based on its position in the periodic table and its chemical properties.

Key Concepts

Periodic Table Groups

The periodic table is organized into columns called groups, which categorize elements based on similar chemical properties. Group 8A, also known as Group 18, contains the noble gases, which are characterized by their full valence electron shells, making them largely inert and nonreactive.

Noble Gases

Noble gases are a group of nonmetals found in Group 8A of the periodic table, including helium, neon, argon, krypton, xenon, and radon. They are known for their lack of reactivity due to having a complete outer electron shell, which makes them stable and unlikely to form chemical bonds.

Classification of Elements

Elements are classified into three main categories: metals, nonmetals, and metalloids. Metals are typically conductive and malleable, nonmetals are generally poor conductors and more brittle, while metalloids exhibit properties of both. Understanding these classifications helps in identifying the nature of elements in the periodic table.