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How many protons are in an element with an atomic number or 8 and a mass number of 18?
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How many protons are in an element with an atomic number or 8 and a mass number of 18?

User Erik Hoeven
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Atomic structure and Isotopes Quiz - Quizizz. The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is
User Ofirbt
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8 protons because protons are equal to the atomic number
User Boson
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