Hydrogen

Hydrogen is the first element on the periodic table, with the chemical symbol H and 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 under standard conditions, and it is the lightest element.

Properties of Hydrogen:

• Atomic Number: 1
• Atomic Mass: 1.008
• Phase at Room Temperature: Gas
• Boiling Point: -252.87°C
• Melting Point: -259.2°C
• Density: 0.08988 g/L

Uses of Hydrogen:

Hydrogen has many important uses, including:

1. Production of ammonia for fertilizer
2. Hydrogenation of fats and oils in food processing
3. Production of methanol and hydrochloric acid
4. Fuel for hydrogen fuel cells in vehicles
5. Energy storage and as a clean fuel for power generation

Study Guide:

Here are some key points to remember about hydrogen:

1. What is the atomic number of hydrogen?
2. What is the phase of hydrogen at room temperature?
3. What is the most abundant element in the universe?
4. List at least three uses of hydrogen.
5. What is the boiling point of hydrogen?

Remember to review these points and feel free to explore more about the fascinating element, hydrogen!