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Lightning is one of the natural mechanisms by which atmospheric nitrogen is converted to ammonia or ammonium ions.
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Q21: Subatomic particle with a positive charge<br>A)NH<sub>4</sub><sup>+</sup><br>B)molecule<br>C)electron<br>D)proton<br>E)neutron<br>F)pH<br>G)Ca<br>H)P<br>I)mass number<br>J)NO<sup>3-</sup><br>K)C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>
Q29: Because there is often no way to
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Q75: Bacteria in the digestive systems of animals