A) 31 neutrons
B) 30 neutrons
C) 32 neutrons
D) 33 neutrons
Answer: A
Explanation: The mass number equals protons plus neutrons. Subtract atomic number 26 from mass number 57 to get 31.
A) 31 neutrons
B) 30 neutrons
C) 32 neutrons
D) 33 neutrons
Answer: A
Explanation: The mass number equals protons plus neutrons. Subtract atomic number 26 from mass number 57 to get 31.
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