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Which of the following is the number of protons in a neutral atom of cobalt (Co)?
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How many neutrons are present in a neutral atom of phosphorus-31?
A
16
B
15
C
31
D
14
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Guida verificata passo dopo passo1
Identify the atomic number (Z) of phosphorus, which is the number of protons in the atom. For phosphorus, Z = 15.
Recognize that the mass number (A) given is 31, which represents the total number of protons and neutrons in the nucleus.
Recall the formula to find the number of neutrons (N): \(N = A - Z\).
Substitute the known values into the formula: \(N = 31 - 15\).
Calculate the difference to find the number of neutrons in the phosphorus-31 atom.
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