When<span> the number </span>of<span> electrons </span>does<span> not equal the number </span>of protons<span>, the </span>atom<span> is</span>ionized<span>. (The </span>atom<span> is then called an ion). ... </span>If<span> your </span>atom is too ionized<span>, it </span>will<span> likely zip away from </span>you<span> and attach itself to a nearby </span>atom<span> or molecule. An </span>atom becomes radioactive when<span> its nucleus contains </span>too<span> many or </span>too<span> few </span>neutrons<span>.</span>
        
             
        
        
        
D. Producers/autotrophs can convert energy from the sun into a form that is available for consumers/heterotrophs to use.
        
             
        
        
        
Answer:
C Water flowing downstream is held up in a reservoir behind a dam. Some water moves down channels through turbines connected to generators which produce electricity
Explanation:
Good explanation.
 
        
                    
             
        
        
        
Answer:
a shallow recess, especially one in a wall to display a statue or other ornament.
 
        
             
        
        
        
Answer:
A group of bacteria that accumulate in layers and secrete an protective extracellular material. 
Explanation:
The biofilm is a natural way how the bacteria get together to survive in an ecosystem or in another living thing. They build little by little this kind of building with different layers of bacteria that secrets a polymer, this protection polymer could be useful to protect the colony or to be attach to another cell or to a tissue. In medicine and in veterinarian studies is interesting because can be useful to create a film to protect some injuries.