O+-+Oxygen

Marcus media type="custom" key="3196854" media type="youtube" key="1aNN6w-5IeM" height="344" width="425" Name: Oxygen Symbol:O Atomic Number:8 Atomic Mass:15.9994 Standard State: Gas at 298 K Group name:Chalcogen Period in Periodic Table: Color:Colorless as gas, Light blue as liquid Classification:Non-Metallic

One fifth of the atmosphere is oxygen. Two thirds of the human body is made of oxygen, and nine tenths of our water is oxygen. The atmosphere of Mars is made up of 0.15% of oxygen. The gas is colorless, odourless and, tasteless. Liquid and solid is pale blue. If you have a room filled with Oxygen and Hydrogen and light a match it would explode! That is because oxygen is very reactive. Oxygen is in the ozone(watter) and in Carbon dioxode. A chemist named Priestly isolated oxygen in 1774.