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There are 2 nitrogen atoms. This is because the (NH3) signifies an ammonia molecule. the 2 after the parentheses shows that there is 2 ammonia molecules. Therefore, you have 2 nitrogen molecules.

Answer:

2 Nitrogen.

Explanation:

The chemical compound contains more than one different element. The compound contain different chemicals that always combine in a fixed ratio and there constitution of the elements remain the same.

The molecule in the compound can be found by looking at the number of molecules and its formula. In the formula Al(NH 3 ) 2 Nitrogen has two molecules, as the single nitrogen will be multiplied by two present outside the formula.

Thus, the answer is 2.

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