They are arranged by their atomic mass.
        
             
        
        
        
Non metal atoms got this from google btw
        
                    
             
        
        
        
<u>Answer:</u> The energy of one photon of the given light is 
<u>Explanation:</u>
To calculate the energy of one photon, we use Planck's equation, which is:

where,
 = wavelength of light = 
        (Conversion factor:  
  )
h = Planck's constant = 
c = speed of light = 
Putting values in above equation, we get:

Hence, the energy of one photon of the given light is 