Usually it seems that they are. Some really are. Others are just not presented in a way that makes them visible. In short, some gases are visible and have colors. Check the link.
they all contract.
halogens are much more reactive
I can only tell you that gases are does not have a difinite shape and volume . E.g air / nitrogen / carbon dioxide / water vapour / . . .
No.Sometimes farts are just gas so they do not always smell.
Neutral gases do not; ionized gases do.
Most gases are invisible to the naked eye. Gases are made up of molecules that are spread out and don't absorb or reflect light in a way that makes them visible. However, some gases do have odors that can be detected.
The atmosphere.
atmosphere
Invisible gas does not fit into the categories of metal or nonmetal. It is a state of matter that refers to gases that are not visible to the naked eye. Many elements in the periodic table can exist in the form of invisible gases, such as hydrogen, oxygen, nitrogen, and carbon dioxide.
The mixture of mostly invisible gases that surrounds Earth is known as the atmosphere. It is composed mainly of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases such as argon, carbon dioxide, and water vapor.
air
the mixture of invisible gases that surround earth
Sulfur dioxide gas is a common invisible product of volcanic eruptions. It is released along with other gases and can contribute to air pollution and create hazy conditions in the atmosphere.
The invisible mixture of gases that surrounds the Earth is called the atmosphere. It is composed mainly of nitrogen (78%) and oxygen (21%), with trace amounts of other gases such as carbon dioxide and argon. The atmosphere plays a crucial role in regulating the planet's temperature and supporting life.
The invisible mixture of gases you breathe is called air. It consists mostly of nitrogen (about 78%) and oxygen (about 21%), with small amounts of other gases like carbon dioxide and argon. These gases are essential for life and play a crucial role in maintaining the Earth's atmosphere.
The duration of All the Invisible Children is 1.93 hours.
All the Invisible Children was created on 2005-09-01.