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A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?
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A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?

User Berhane
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2 Answers

3 votes

Answer:

C

Step-by-step explanation:

calcium

User Kately
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7 votes

Answer:

calcium

Step-by-step explanation:

User Arboreal Shark
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