Nitrogen (N2)is

question 32

Multiple Choice

Nitrogen (N2) is

• A)a key component of life,integrated into our bodies directly from the air.
• B)cycled through the environment via the activity of bacteria.
• C)a product of the radioactive decay of a form of potassium in the crust.
• D)now measured at 20.946% by volume in the homosphere.
• E)the least abundant constant gas in the homosphere.

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