Question

this is how sodium appears in the periodic table. the arrow is pointing to sodiums number of neutrons. chemical symbol atomic mass combined number of electrons and protons.

Explanation:

In the periodic table, the number at the bottom of an element's box (below the name) represents the atomic mass (also called atomic weight). The arrow is pointing to 22.99, which is sodium's atomic mass. The number of neutrons is calculated as atomic mass - atomic number (not directly the value here), the chemical symbol is "Na", and the combined number of electrons and protons would be related to atomic number (11, since electrons = protons = atomic number in neutral atoms), not 22.99.

Answer:

atomic mass (the option corresponding to "atomic mass")