Helium
Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions.
Properties of Helium:
- Atomic symbol: He
- Atomic number: 2
- Boiling point: -268.9°C
- Melting point: -272.2°C
- Density: 0.1786 g/L
- State at room temperature: Gas
- Uses: Helium is commonly used as a lifting gas in balloons, as a cooling medium for nuclear reactors and to create inert atmospheres for welding, and as a carrier gas in gas chromatography.
Study Guide:
To learn more about helium, here are some key points to study:
- What is the atomic number of helium?
- What are the properties of helium at room temperature?
- What are the common uses of helium?
- Why is helium used as a lifting gas in balloons?
- How does helium behave under extreme conditions?
Understanding the properties and uses of helium will provide a solid foundation for further exploration of this fascinating element.
.◂Science Worksheets and Study Guides Kindergarten. Living and Nonliving
The resources above cover the following skills:
PHYSICAL SCIENCE (NGSS)
Motion and Stability: Forces and Interactions
Students who demonstrate understanding can:
Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.
Analyze data to determine if a design solution works as intended to change the speed or direction of an object with a push or a pull.
EARTH AND SPACE SCIENCE (NGSS)
Earth and Human Activity
Students who demonstrate understanding can:
Use a model to represent the relationship between the needs of different plants or animals (including humans) and the places they live.