Question

there are four different isotopes of iron
fe - 54 5.86% 53.9400 amu
fe - 56 91.75% 55.9349 amu
fe - 57 2.12% 56.9354 amu
fe - 58 0.28% 57.9333 amu
part b
determine the number of neutrons in each of the following isotopes of iron
enter your answers as integers separated by commas.
number of neutrons in
fe - 54, fe - 56, fe - 57, fe - 58 =

Explanation:

Step1: Recall the formula for number of neutrons

Number of neutrons \(N = A - Z\), where \(A\) is the mass number (the number after the element symbol in the isotope notation, e.g., for \(Fe - 54\), \(A = 54\)) and \(Z\) is the atomic number. For iron (\(Fe\)), \(Z=26\).

Step2: Calculate for \(Fe - 54\)

\(N_{54}=54 - 26=28\)

Step3: Calculate for \(Fe - 56\)

\(N_{56}=56 - 26 = 30\)

Step4: Calculate for \(Fe - 57\)

\(N_{57}=57 - 26=31\)

Step5: Calculate for \(Fe - 58\)

\(N_{58}=58 - 26 = 32\)

Answer:

\(28,30,31,32\)