Answer:
Isotopes
Explanation:
Isotopes are the same element with different masses because of the different number of neutrons. Also, the element doesn't change. If we change the protons, the element will change and then it won't be an isotope. Hope it helps! 
 
        
             
        
        
        
Answer:
The reaction will be slower because the leaving group will be poorer. 
Explanation:
One Important thing to put at the back of our mind is that weak bases are good leaving groups. Another thing to take note is that in the halogen series(which is our main subject in this question) as you go down the group the greater or the more heavy the halide is and the heavier halides are more stable that is Bromine will be more stable than chlorine.
Now, we are now told that the bromo halide is been replaced by the chloro halide which means that the rate of Reaction will surely decrease because the leaving group. The cl^- is a stronger base.
 
        
             
        
        
        
Answer:
2.1 moles of water formed.
Explanation:
Given data:
Moles of water formed = ?
Moles of Ni(OH) = 4.20 mol
Solution:
Chemical equation:
2Ni(OH)    →  Ni₂O + H₂O
Now we will compare the moles of Ni(OH)  with water.
              Ni(OH)           :            H₂O
                 2                 :              1
               4.20             :            1/2×4.20 = 2.1 mol
2.1 moles of water formed.
 
        
             
        
        
        
It’s baron I got it right on edg
        
                    
             
        
        
        
The request is characterized as knowing where things are and having the capacity to discover and utilize the things. 
In a compound procedure, there is more issue, more entropy when the particles 
1. warm up, increment in temperature. The atoms are more disorganized 
2. get stirred up and must be isolated with exertion. Bedlam. 
3. state changes, dissolves, vaporizes. The atoms are more turbulent 
4. respond to frame a pack of various particles. More disorder