Oxygen, Nitrogen, Carbon Dioxide and Argon.
I'm afraid that the Earth's early atmosphere was made up of Ammonia, Water vapour, Carbon monoxide, Methane, Sulphur dioxide, Helium, Carbon Dioxide, Nitrogen & a few other gases.
Comments number 1 & 3 are wrong because it's asking for Earth's EARLY atmosphere but there was no Oxygen in Earth's EARLY atmosphere!!
The most abundant gases in the Earth's crust are oxygen and silicon dioxide, which make up the majority of minerals found in rocks. Other gases that can be found in small amounts in the crust include carbon dioxide, nitrogen, and water vapor.
Gases present in the air in very small amounts are called trace gases. These include gases such as argon, carbon dioxide, methane, and ozone, which, despite their low concentrations, can have significant environmental and climatic effects. Trace gases play crucial roles in various atmospheric processes, including the greenhouse effect and air quality.
Obviously not all gases are toxic, but in general, toxic gases tend to be so dangerous because they are gases. It is difficult to contain them once released into the air, and they mix easily with the air, so that even small amounts of a toxic substance are incorporated quickly.
Noble gases usually exist as monatomic (single atom) gases because they have a stable electron configuration and are inert, meaning they do not easily react with other elements. This makes them chemically unreactive and often found in their elemental form in nature.
Two noble gases are helium and neon. These gases are odorless, colorless, and generally do not react with other elements due to their fully-filled outer electron shells. They can be found in small quantities in the Earth's atmosphere.
Other small gases found in the atmosphere include methane, nitrous oxide, and ozone. These gases play a role in the Earth's climate system and are important for understanding the chemistry and composition of the atmosphere.
The mesosphere mainly consists of oxygen, nitrogen, and a small amount of other gases such as carbon dioxide, helium, and hydrogen. These gases are present in varying concentrations at different altitudes within the mesosphere.
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Helium is considered one of the rarest gases on Earth. It is a non-renewable resource found in small concentrations and is often extracted from natural gas reservoirs. The scarcity of helium has led to concerns about its supply for various industries and applications.
penis
Radium exist in very small concentrations in some meteorites.
The most abundant gases in the Earth's crust are oxygen and silicon dioxide, which make up the majority of minerals found in rocks. Other gases that can be found in small amounts in the crust include carbon dioxide, nitrogen, and water vapor.
PPM is an acronym for parts per million, a term for quantifying small concentrations of substance in gases, liquids, or solids.
Xenon is a noble gas and is found in very small amounts in the Earth's atmosphere. It is extracted through fractional distillation of liquid air. Xenon is also found in trace amounts in certain minerals and meteorites.
Ozone is an allotrope of oxygen which is found mainly in the stratospheric region. Some small concentrations of ozone are also present in the tropospheric region but the concentrations are of the level of parts per million so the concentrations are mainly neglected.
Obviously not all gases are toxic, but in general, toxic gases tend to be so dangerous because they are gases. It is difficult to contain them once released into the air, and they mix easily with the air, so that even small amounts of a toxic substance are incorporated quickly.
The rare gases, also known as noble gases, make up about 1% of the Earth's atmosphere. This includes gases like helium, neon, argon, krypton, xenon, and radon. These gases are considered rare because they are present in very small concentrations compared to other gases like nitrogen and oxygen.