question 1 (1 point)\nwhat does the number to the top left of the symbol tell us?\nnumber of protons and…

question 1 (1 point)\nwhat does the number to the top left of the symbol tell us?\nnumber of protons and electrons (combined number)\nnumber of protons and neutrons (mass number)\nnumber of electrons and neutrons (neutron number)

question 1 (1 point)\nwhat does the number to the top left of the symbol tell us?\nnumber of protons and electrons (combined number)\nnumber of protons and neutrons (mass number)\nnumber of electrons and neutrons (neutron number)

Answer

Brief Explanations:

In atomic notation, the number at the top - left of the symbol is the mass number, which represents the sum of protons and neutrons in an atom.

Answer:

number of protons and neutrons (mass number)