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Subatomic particle carrying a negative charge - ️️Electron Number of electrons in the outermost shell of an atom with 15 electrons - ️️5 Innermost shell of an atom - ️️Holds 2 electrons Electrically neutral atom with atomic number 8 and mass number 17 has - ️️8 protons What predicts the element to which an atom belongs? - ️️Total number of protons Four most common elements comprising 96% of the body's mass - ️️Oxygen, nitrogen, hydrogen, carbon Atom of iron with...