Final answer:
An element's box in the periodic table contains the atomic number and the chemical symbol, with the atomic number above the chemical symbol; additional information such as atomic mass may also be included. The correct options are A. Atomic number and B. Chemical symbol
Step-by-step explanation:
The two types of information found in an element's box in the periodic table are atomic number and chemical symbol. The atomic number, which is the number of protons in the nucleus of an atom, is typically found above the element's symbol, clearly identifying the element and its placement on the periodic table. The chemical symbol is a one-, two-, or three-letter abbreviation of the element's name. Each element's box may also display additional information, such as its atomic mass, which is the weighted average of the masses of all the natural isotopes of the element.