Iron

Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust.

Properties of Iron

• Atomic number: 26
• Atomic mass: 55.845
• Physical state at room temperature: Solid
• Color: Silvery-gray
• Melting point: 1538°C
• Boiling point: 2861°C

Uses of Iron

Iron is an important metal in industries and everyday life. Some common uses of iron include:

• Construction and infrastructure
• Manufacturing of steel and iron alloys
• Machinery and equipment
• Transportation (e.g., vehicles, railways)
• Household items (e.g., utensils, tools)

Role of Iron in Living Organisms

Iron is an essential element for many living organisms, including humans. It plays a crucial role in the following biological processes:

• Formation of hemoglobin in red blood cells for oxygen transport
• Enzyme reactions involved in energy production and metabolism
• Synthesis of DNA and cell growth

Iron in the Environment

Iron is also present in the environment and can interact with other elements and compounds. It can undergo oxidation and reduction reactions, contributing to various natural processes such as the rusting of iron objects and the formation of iron-rich soils.

Study Guide Questions

1. What is the atomic number of iron?
2. What are some common uses of iron in industries?
3. Explain the role of iron in the human body.
4. How does iron interact with the environment?