Hydrogen

Hydrogen is the first element on the periodic table with the atomic number 1 and the symbol H. 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.

Properties of Hydrogen

• Atomic Number: 1
• Symbol: H
• Atomic Mass: 1.008 u
• Phase at Room Temperature: Gas
• Boiling Point: -252.87°C
• Melting Point: -259.16°C
• Density: 0.08988 g/L
• Electronegativity: 2.20

Uses of Hydrogen

Hydrogen has a wide range of industrial applications, including:

• Production of ammonia for fertilizers
• Hydrogenation of oils and fats in food processing
• Production of methanol for fuels
• Hydrogen fuel cells for clean energy
• Hydrogen as a reducing agent in various chemical processes

Study Guide

Here are some key points to remember about hydrogen:

1. Hydrogen is the first element on the periodic table with the atomic number 1 and the symbol H.
2. It is the most abundant element in the universe, making up about 75% of its elemental mass.
3. Hydrogen is a colorless, odorless, and tasteless gas at room temperature.
4. It has a low density and is highly flammable.
5. Hydrogen has a wide range of industrial applications, including the production of ammonia, hydrogenation of oils, and hydrogen fuel cells for clean energy.

Remember to study the properties, uses, and applications of hydrogen to gain a comprehensive understanding of this important element.