reactive atmosphere

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• atmosphere, evolution of — Introduction  the development of Earth s (Earth) atmosphere across geologic time. The process by which the current atmosphere arose from earlier conditions is complex; however, evidence related to the evolution of Earth s atmosphere, though… …   Universalium

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• atmosphere — atmosphereless, adj. /at meuhs fear /, n., v., atmosphered, atmosphering. n. 1. the gaseous envelope surrounding the earth; the air. 2. this medium at a given place. 3. Astron. the gaseous envelope surrounding a heavenly body. 4. Chem. any… …   Universalium

• Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …   Wikipedia

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• Inert gas — Inert gases is also used in a narrower sense for noble gases. An inert gas is any gas that is not reactive with elements.Like the noble gases an inert gas is not necessarily elemental and are often molecular gases. Like the noble gases the… …   Wikipedia

• nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

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