Determine whether or not each element is a main-group element. a. tellurium b. potassium c. vanadium d. manganese

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Identify the position of manganese on the periodic table. Manganese is represented by the symbol Mn and has an atomic number of 25.

Understand the structure of the periodic table, specifically the division between main-group elements and transition metals. Main-group elements are found in the s-block and p-block, while transition metals are located in the d-block.

Locate which block manganese falls into. Since manganese has an atomic number of 25, it is located in the d-block of the periodic table.

Recognize that elements in the d-block are classified as transition metals, not main-group elements.

Conclude that manganese, being a d-block element, is not a main-group element but rather a transition metal.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Main-Group Elements

Main-group elements, also known as representative elements, are found in groups 1, 2, and 13-18 of the periodic table. These elements typically exhibit a wide range of chemical properties and include metals, nonmetals, and metalloids. They are characterized by their valence electron configurations, which play a crucial role in determining their chemical behavior.

Periodic Table Groups

The periodic table is organized into vertical columns called groups, which categorize elements based on similar properties and electron configurations. Elements in the same group often exhibit similar reactivity and bonding characteristics. Understanding the group placement of an element helps predict its chemical behavior and interactions with other elements.

Transition Metals

Transition metals are found in groups 3 to 12 of the periodic table and are characterized by their ability to form variable oxidation states and complex ions. Manganese, specifically, is classified as a transition metal due to its position in group 7. This classification is important for understanding its chemical properties and its role in various chemical reactions.

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Which pair of elements do you expect to be most similar? Why? a. nitrogen and oxygen b. titanium and gallium c. lithium and sodium d. germanium and arsenic e. argon and bromine

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Write the symbol for each element and classify it as a metal, nonmetal, or metalloid. a. gold b. fluorine c. sodium d. tin e. argon

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Textbook Question

Fill in the blanks to complete the table.

Symbol Ion Formed Number of Electrons in Ion Number of Protons in Ion

Cl ______ ______ 17

Te ______ 54 ______

Br Br^– ______ ______