객관식
How many protons are present in the nucleus of a single atom of 56 26 Fe?
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Multiple Choice
An ion has 109 electrons, 110 neutrons, and 108 protons. What is the mass number of this ion?
A
110
B
218
C
108
D
217
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검증된 단계별 안내1
Identify the number of protons and neutrons given in the problem. Here, the ion has 108 protons and 110 neutrons.
Recall that the mass number (A) of an atom or ion is the total number of protons and neutrons in its nucleus.
Use the formula for mass number: \(A = Z + N\), where \(Z\) is the number of protons and \(N\) is the number of neutrons.
Substitute the given values into the formula: \(A = 108 + 110\).
Add the numbers to find the mass number, which represents the total nucleons in the ion.
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