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What is some basic information about oxygen - the element?

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Element No. 8 on the Periodic Table of the Elements is a colorless gas that makes up 21 percent of Earth's atmosphere. Because it's all around, oxygen is easy to dismiss as dull and inert; in fact, it's the most reactive of the non-metallic elements. read more

Interesting Oxygen Facts: One fifth of the Earth's atmosphere is made up of oxygen and is the third most abundant element in the universe by mass. Oxygen is the most abundant element by mass in the Earth's biosphere. read more

Oxygen is one of the best-known gases on the planet, largely because it is so important for our physical survival. It is a crucial part of Earth's atmosphere and hydrosphere, it's used for medical purposes, and it has a profound effect on plants, animals, and metals. Facts About Oxygen. Oxygen is atomic number 8 with the element symbol O. read more

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