How does the size of oxygen's nucleus affect the distribution of electrons in the water molecule<span>? 
The </span>oxygen's nucleus<span> contains eight protons.</span>
        
             
        
        
        
The sustainable use of land means using the spare land in such an activity which supports the society and benefits the environment. 
In such a situation if a land is found spare then a park should be constructed on it. 
This will create an recreational activity spot for the society and they will be able to spend their leisure time with fun. 
Also there will be less pollution and harm to environment will be lowered by greenery and trees in the park.
Learn more at brainly.com/question/24353052
 
        
                    
             
        
        
        
Since the other answer got deleted, i'll just answer it for you.
a sinoatrial node is the main pacemaker that begins each heartbeat located in the junctions of superior vena cava and the right atrium. It signals from the node that spread through the atria and determines the heart rates.