The particle of an atom. That carries no electrical charge is called a

Neutrons have no electrical charge. Protons and neutrons together make a dense bundle at the center of an atom. This bundle is called the nucleus. Electrons have a negative electrical charge (-) and move around the nucleus. Electrons are the smallest of these particles.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

you can have just about every answer you can think of