Properties of Hydrogen
- Atomic Number: 1
- Symbol: H
- Atomic Mass: 1.008
- State at Room Temperature: Gas
- Boiling Point: -252.87°C
- Melting Point: -259.2°C
- Density: 0.08988 grams per liter
- Electron Configuration: 1s1
Uses of Hydrogen
Hydrogen has several important uses:
- Hydrogen is used in the production of ammonia for fertilizers.
- It is used in the petroleum and chemical industries for hydrocracking and hydrodesulfurization processes.
- Hydrogen is used as a fuel for spacecraft and vehicles powered by fuel cells.
- It is also used in the production of methanol and in the hydrogenation of fats and oils.
Hydrogen in the Universe
Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass. It is found in stars and plays a key role in the process of nuclear fusion, which powers the stars.
Hydrogen Safety
Hydrogen is flammable and can form explosive mixtures with air. Special precautions are necessary when handling and storing hydrogen to prevent accidents.
Fun Facts about Hydrogen
- Hydrogen is the lightest element and is used in the production of helium through nuclear fusion in stars.
- Hydrogen gas was used in the first successful flight of a hydrogen balloon in 1783.
- Hydrogen fuel cells are being developed as a clean and renewable energy source for the future.
◂Science Worksheets and Study Guides Third Grade. Relationships among living things
Study Guide
Relationships among living things 
Activity Lesson
Relationships Among Living Things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
From Molecules to Organisms: Structures and Processes
Create representations to explain the unique and diverse life cycles of organisms other than humans (e.g., flowering plants, frogs, butterflies), including commonalities such as birth, growth, reproduction, and death.
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.