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The Atmosphere

The Atmosphere. Chemical Storylines. A1 What’s in the air?. It is a relatively thin layer of gas (about 100km thick) The two most chemically important regions are the STRATOSPHERE and the TROPOSPHERE 90% of all molecules in the atmosphere are in the bottom 15km ( the troposphere ).

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METO 621 CHEM

METO 621 CHEM. Lesson 1. CHEMICAL FORMULA. Each atom is given a symbol, N stands for nitrogen, O for oxygen, Cl for chlorine. For molecules, the number of atoms is placed as a subscript, for example Nitrogen Dioxide is written as NO 2 , and contains one nitrogen atom and two oxygen atoms.

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The formation of stars and planets

The formation of stars and planets . Day 1, Topic 2: Radiation physics Lecture by: C.P. Dullemond. Astronomical Constants. CGS units used throughout lecture (cm,erg,s...) AU = Astronomical Unit = distance earth - sun = 1.49x10 13 cm

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