Elements Krypton & Pallamium

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Issue:

Science

 

Written by:

David K

 

Date added:

March 23, 2014

 

Level:

University

 

Grade:

A

 

No of pages / words:

1 / 271

 

Was viewed:

3095 times

 

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Essay content:

The other noble gases are helium, xenon, neon, argon and radon. I was discovered in England in 1898 almost 100 years ago by Sir William Ramsey and Morris W. Travers. They found me in the less volatile part of inert-gas mixture left after oxygen had been chemically removed from a sample of air. I am about one millionth of the earth's atmosphere...
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I am about one millionth of the earth's atmosphere. Only about 2 x 10-8% of the weight of the earth am I. I am a colorless, odorless and tasteless gas. My atomic number is 36. My atomic weight is 83.80. My melting point is -157.20°C or -251.5°F. My gas density at 0°C is 3.749 g/liter. My valence is 0,2...
displayed 300 characters

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