Question

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question 10 (6 points)
an iron - 56 nucleus contains
a 26 protons and 26 neutrons
b 26 protons and 30 neutrons
c 56 protons and 56 neutrons
d 56 protons
e 56 neutrons

Explanation:

For an element, the atomic number (number of protons) is specific. Iron (\(Fe\)) has an atomic number of \(26\). The mass number (\(A\)) is given as \(56\). The formula for the number of neutrons (\(N\)) is \(N=A - Z\), where \(Z\) is the atomic number. Substituting \(A = 56\) and \(Z=26\), we get \(N=56 - 26=30\).

Answer:

B. 26 protons and 30 neutrons