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Which of the following is a composition of an isotope of calcium (atomic number 20)? 20 protons, 25 neutrons, 20 electrons 22 protons, 20 neutrons, 19 electrons 21 protons, 20 neutrons, 20 electrons 19 protons, 20 neutrons, 19 electrons
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Professional:
@Vocaloid
Vocaloid:
the atomic number is equal to the number of protons there is only one option with 20 protons
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