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The complete history of the Universe -- from the Big Bang to 200 my into the future

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Nitrogen

Nitrogen has seven electrons, so its outer shell has three holes and its valence is three. Nitrogen atoms can make 3 covalent bonds. For example a nitrogen can combine with three hydrogen atoms to form a molecule of ammonia.

Ball and stick model of ammonia NH3

In models, nitrogen atoms are usually colored blue.

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History of the Universe eBook. 398 pages, 300 illustrations only $2.99

eBook only $2.99
398 pages, 300 images

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