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AP® Environmental Science

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Atmospheric Nitrogen

APES-XL1V74

The most abundant form of nitrogen in the atmosphere is _____.

A

${ N }_{ 2 }$

B

${ NH }_{ 4 }^{ + }$

C

${ NO }_{ 3 }^{ - }$

D

${ NH }_{ 3 }^{ }$

E

${ HNO }_{ 3 }^{ }$