The number of protons in an atoms determines the atoms identity. Electrons determine the electrical charge.
        
                    
             
        
        
        
Answer:
Group 1 metals and transition metals are different from each other, mainly based on the colour of the chemical compounds that they form. The key difference between group 1 metals and transition metals is that the group 1 metals form colourless compounds, whereas the transition metals form colourful compounds.
 
        
                    
             
        
        
        
Answer:It’s C on edge 2020
(Combustion of car engines producing pollutants in the air)
Explanation:
I got it right :))