Which piece of information would most a historian create an interpretation of this photograph of works in a factory?

Okay so, each element always is abbreviated with a capital letter and a lowercase letter, so each each new elements starts with a capital letter. To answer these problem you have to find the element or compound and whats in the element/compound and count how many you have. Then, it transfers over the arrow to how many of each element you have.

I hope this helps! :)