It is called this because it has elements and it is categorized into periods. All the elements placed in an order that every 8th element matches with the its 1st element, in behalf of their chemical properties. All the elements placed a vertical lines have similar chemical properties and ascending or descending in physical properties.
Vertical lines are called groups. Horizontal lines are called periods.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.