Hello friends I will show how create a 3dsmax 3d nuclear model tutorial.
I have used following techniques shown below in this 3ds max tutorial.
[1]-Start 3dsmax and choose "Circle" with the good following size 
[2]-Open the rendering palette and now use the following setting 
[3]-Place the circle like this 
[4]-Create two more copy and place like me 
[5]-Create four with the different following size now set like this 
[6]-This is my material palette and creates something materials like this 
[7]-Set the skylight like this with the following parameter 
[8]-This is my final result are you looking it 