Hydrogen

Hydrogen is the first element on the periodic table with the atomic number 1. It is the most abundant element in the universe, making up about 75% of its elemental mass. Hydrogen is a colorless, odorless, and tasteless gas at room temperature. It is the lightest element and is highly flammable.

Properties of Hydrogen:

• Atomic Number: 1
• Symbol: H
• Atomic Mass: 1.008 g/mol
• State at Room Temperature: Gas
• Boiling Point: -252.87°C
• Freezing Point: -259.2°C
• Density: 0.08988 g/L
• Electron Configuration: 1s¹

Uses of Hydrogen:

Hydrogen has several important uses:

1. Hydrogen is used in the production of ammonia, which is a key component of fertilizers.
2. It is used in the petroleum and chemical industries for hydrocracking and hydrodesulfurization processes.
3. Hydrogen is used as a rocket fuel for space exploration.
4. It is also used in fuel cells to power vehicles and provide electricity.

Study Guide

Here are some key points to remember about hydrogen:

1. Hydrogen is the most abundant element in the universe.
2. It is a colorless, odorless, and tasteless gas at room temperature.
3. Hydrogen has an atomic number of 1 and an atomic mass of 1.008 g/mol.
4. It is highly flammable and burns with a pale blue flame.
5. Hydrogen is used in the production of ammonia, petroleum refining, rocket fuel, and fuel cells.

Remembering these key points will help you understand the importance and properties of hydrogen.