Chemistry, 04.09.2020 06:01 lizdeleon248
What is the mass number of an
atom which contains 21 electrons,
21 protons, and 24 neutrons?
21
66
42
45
Answers: 2
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What is the mass number of an
atom which contains 21 electrons,
21 protons, and 24 neutrons?<...
21 protons, and 24 neutrons?<...
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