Similarities: same atomic number
Differences: they have a different number of neutrons
        
                    
             
        
        
        
Answer:
x = 9/2 or 4 1/2 or 4.5
Step-by-step explanation:
Divide both sides by the numeric factor on the left side, then solve. Hope this helped :)!
 
        
             
        
        
        
Answer:
 3 to 5 This is because if you simplify the ratio by dividing each number in the ratio by 4, therefore for every group of 5 birds 3 of them are parrots
Step-by-step explanation:
 
        
                    
             
        
        
        
I’m just doing this to finish my account stuff haha but good luck