Biology, 03.09.2019 19:30 brittanysanders
The most common form of calcium has 20 protons, 20 neutrons, and 20 electrons. which of the following elements would be an isotope of calcium?
1. an atom with 20 protons, 21 neutrons, and 20 electrons
2. an atom with 21 protons, 21 neutrons, and 21 electrons
3. an atom with 21 protons, 20 neutrons, and 21 electrons
4. an atom with 20 protons, 20 neutrons, and 18 electrons
5. all of the listed responses are correct.
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