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What determines the chemical properties of an element? A. the number and arrangement of the electrons in an atom B. the number of neutrons and protons in an element C. the arrangement of all the neutrons, protons, and electrons D. the atomic mass of an atom

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megamixer2002
The sum of the protons and neutrons in an atom equals the mass number.   
ellemooreee

the answer would be A. the number and arrangement of the electrons in an atom

ik bc i took the test

:)

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