This is a list of gases at standard conditions, which means substances that boil or sublime at or below 25 °C (77 °F) and 1 atm pressure and are reasonably stable.

2025年3月25日 · gas, one of the three fundamental states of matter, with distinctly different properties from the liquid and solid states. The remarkable feature of gases is that they appear to have no structure at all.

Gas is one of the four fundamental states of matter. The others are solid, liquid, and plasma. [1][better source needed] A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide).

2021年3月23日 · Examples of gases include air, water vapor, and helium. A gas is a state of matter that has no fixed volume or shape. In other words, a gas takes the shape and volume …

In this chapter, we explore the relationships among pressure, temperature, volume, and the amount of gases. You will learn how to use these relationships to describe the physical behavior of a sample …

Gases have the lowest density of the three, are highly compressible, and fill their containers completely. Elements that exist as gases at room temperature and pressure are clustered on the right side of the periodic table; they occur as either monatomic gases (the noble gases) or diatomic molecules (some halogens, N₂, O₂).

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2019年5月4日 · A gas is made of particles without a set shape or volume, unlike solids and liquids. Gases at room temperature include air, chlorine, ozone, oxygen, and hydrogen. Gases have lots of space between particles and are usually clear, with a few exceptions.

All gases can flow, like liquids. This means the molecules move about independently of each other. Most gases are colourless, like hydrogen. [2] Gas particles will spread about, or diffuse, in order to fill all the space in any container such as a bottle or a room. Compared to liquids and solids, gases have a very low density and viscosity.

2024年2月28日 · A gas is a form of matter characterized by its lack of a definite shape and volume. Gases exhibit lower density compared to solids and liquids, and their