Complete the exercises below. Identify each of the following elements as a metal, nonmetal, or metalloid: a. phosphorus, b. strontium, c. manganese, d. selenium, e. sodium, f. krypton.

Name: Chemistry: The Central Science
Author: Brown
ISBN: 9780134414232

검증된 단계별 안내

Step 1: Understand the classification of elements into metals, nonmetals, and metalloids based on their properties. Metals are typically shiny, good conductors of heat and electricity, and malleable. Nonmetals are usually poor conductors and can be gases, liquids, or brittle solids. Metalloids have properties intermediate between metals and nonmetals.

Step 2: Locate each element on the periodic table to determine its classification. The periodic table is organized in such a way that metals are generally found on the left and center, nonmetals on the right, and metalloids along the dividing line between metals and nonmetals.

Step 3: Identify phosphorus (P) on the periodic table. Phosphorus is located in group 15 and is a nonmetal.

Step 4: Identify strontium (Sr) on the periodic table. Strontium is located in group 2 and is a metal.

Step 5: Identify manganese (Mn) on the periodic table. Manganese is located in group 7 and is a metal.

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Periodic Table Classification

Elements are classified into metals, nonmetals, and metalloids based on their properties and positions in the periodic table. Metals, typically found on the left side, are good conductors of heat and electricity, while nonmetals, located on the right, are poor conductors and often have more varied properties. Metalloids, situated along the zig-zag line, exhibit characteristics of both metals and nonmetals.

Properties of Metals

Metals are generally characterized by their luster, malleability, ductility, and high electrical and thermal conductivity. They tend to lose electrons during chemical reactions, forming positive ions. Common examples include elements like sodium and strontium, which are essential in various industrial applications and biological processes.

Properties of Nonmetals

Nonmetals are elements that lack the characteristics of metals and are usually poor conductors of heat and electricity. They can be gases, liquids, or solids at room temperature and often gain electrons in chemical reactions to form negative ions. Elements like phosphorus, selenium, and krypton are examples of nonmetals, each playing crucial roles in biological and chemical systems.