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What can you say about a calcium atom by looking at the symbol ⁴⁴₂₀Ca? a. A calcium atom has 44 neutrons and 20 electrons. b. A calcium atom has 20 protons and 24 electrons. c. A calcium atom has 64 protons and 20 neutrons. d. A calcium atom has 20 protons and 24 neutrons. e. A calcium atom has 20 protons and 44 neutrons.
Sagot :
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