Answer:
Electrons are the negatively charged particles of an atom. Together, all of the electrons of an atom create a negative charge that balances the positive charge of the protons in the atomic nucleus. Electrons are extremely small compared to all of the other parts of the atom. The mass of an electron is almost 1,000 times smaller than the mass of a proton.
Explanation:
I hope this helped!
 
        
             
        
        
        
<span>D. fossils
Hope im right!(: </span>
        
                    
             
        
        
        
Because longer life spans are bad for hormones and shorter are good for lungs.
        
             
        
        
        
The Muscular system. If you look at the human body, you see we're made of layers. 1st layer is the skeleton, the maintains the body's shape, then you have the 2nd layer, the muscular, this provides the ability of movement. And the layers keep going until you get to the skin.
        
             
        
        
        
Are you looking for an explanation or the equation?