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Chemistry, 24.09.2019 04:20 Jalenmiller492
The mass number of an atom is 15, and its atomic number is 7. the atom probably 8 neutrons in the nucleus. about as much mass in electrons as in protons. at least 15 electrons. 7 units of negative charge in the nucleus. 7 electrons in the nucleus.
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The mass number of an atom is 15, and its atomic number is 7. the atom probably 8 neutrons in the n...
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