Problem 14 - Applied Physics

Question

Use the Periodic Table to determine the following: Which of the elements \(\mathrm{C}, \mathrm{N}, \mathrm{O}\), and \(\mathrm{Fe}\) is a metal?

Step-by-Step Solution

Answer

Fe (iron) is the metal.

Step 1: Understand the Problem

We need to identify which among the given elements, \( \mathrm{C} \), \( \mathrm{N} \), \( \mathrm{O} \), and \( \mathrm{Fe} \), is a metal. For this task, we'll use the Periodic Table to determine the classification of these elements.

Step 2: Locate the Elements on the Periodic Table

Find the elements \( \mathrm{C} \), \( \mathrm{N} \), \( \mathrm{O} \), and \( \mathrm{Fe} \) on the Periodic Table. \( \mathrm{C} \), \( \mathrm{N} \), and \( \mathrm{O} \) are located in the p-block of the Periodic Table, while \( \mathrm{Fe} \) is located in the d-block.

Step 3: Determine the Element Classification

Consult the Periodic Table to classify the elements: \( \mathrm{C} \) (carbon) is a non-metal, \( \mathrm{N} \) (nitrogen) is a non-metal, \( \mathrm{O} \) (oxygen) is a non-metal, and \( \mathrm{Fe} \) (iron) is classified as a metal.

Step 4: Confirm the Metal

Based on their locations and groupings on the Periodic Table, conclude that \( \mathrm{Fe} \) (iron) is the only metal among the given elements.

Key Concepts

Element Classification

Understanding element classification is vital to studying chemistry and the Periodic Table. Elements are broadly categorized into metals, non-metals, and metalloids based on their physical and chemical properties. This classification helps predict an element's behavior and its reactions with other substances.

• Metals are typically shiny, good conductors of heat and electricity, and are malleable. They tend to lose electrons in reactions and form positive ions.
• Non-metals are often dull, poor conductors, and brittle in solid form. Non-metals usually gain electrons during chemical reactions to form negative ions.
• Metalloids exhibit properties of both metals and non-metals and can be semiconductors.

The Periodic Table is structured to display these classifications clearly. Metals are generally located on the left and in the center, while non-metals are on the right with metalloids situated in between.
In our exercise, we identify iron ( Fe) as a metal, while carbon ( C), nitrogen ( N), and oxygen ( O) are non-metals. Determining the classification of an element aids in understanding its general characteristics and expected behavior in reactions.

Metals and Non-Metals

Metals and non-metals represent two major groups on the Periodic Table, distinguished by their contrasting properties.
Metals, which include elements like iron ( Fe) , possess several defining qualities:

• They are generally solid at room temperature (except for mercury).
• Metals have high melting and boiling points.
• They are ductile and malleable, meaning they can be drawn into wires or hammered into sheets.
• Metals conduct electricity and heat effectively due to the free flow of electrons.

On the other hand, non-metals like carbon ( C), nitrogen ( N), and oxygen ( O) exhibit different characteristics:

• They may be solid, liquid, or gas at room temperature.
• Non-metals have lower boiling and melting points compared to metals.
• They are generally brittle in solid form and do not conduct electricity or heat well.

Non-metals often form covalent bonds by sharing electrons, while metals can form both ionic and metallic bonds. The classification and properties of these elements are essential for applications in various fields such as industrial manufacturing and biological processes.

d-block and p-block

The d-block and p-block are specific sections of the Periodic Table that help classify elements based on their electron configurations.
These blocks are key to understanding element placement and chemical properties:

• The d-block consists primarily of transition metals. These elements have electrons filling their d orbital and are located in the center of the Periodic Table.
• d-block elements, such as iron ( Fe) , are known for their ability to form multiple oxidation states, complex ions, and colored compounds.
• These metals often serve as catalysts in chemical reactions due to their partially filled d orbitals.

In contrast, the p-block includes a variety of element types, notably the non-metals, metalloids, and some metals:

• It covers the rightmost section of the Periodic Table, containing elements like carbon ( C), nitrogen ( N), and oxygen ( O) .
• p-block elements have their electrons filling the p orbital, featuring broad chemical diversity, from the reactive halogens to the stable noble gases.

Understanding these two blocks aids in predicting element reactivity and bonding potential, paving the way for advancements in chemistry and material science. Knowing whether an element lies in the d-block or p-block can profoundly impact how it is used in technological and academic settings.