What is the main benefit of this model? Atom structure
+ Proton
Neutron
Electron
A. It helps scientists make predictions about how atoms form.
B. It shows the parts of an atom that are too small to be seen.
C. It demonstrates that all atoms have the same number of parts.
D. It explains why there are different kinds of atoms.

Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.

Explanation:

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the correct answer is 2 and 4