Question

an atom of the element fluorine can be represented by the bohr model shown below. if the atomic mass of this atom is 19, how many neutrons are in the nucleus? 9 10 19 28

Explanation:

Step1: Recall the atomic number of fluorine

The atomic number of fluorine (\(F\)) is \(9\). The atomic number \(Z\) is equal to the number of protons. So, the number of protons \(p = 9\).

Step2: Use the formula for atomic mass

The formula for atomic mass \(A\) is \(A=p + n\), where \(A\) is the atomic mass, \(p\) is the number of protons, and \(n\) is the number of neutrons. We know that \(A = 19\) and \(p=9\). Rearranging the formula for \(n\), we get \(n=A - p\).

Step3: Calculate the number of neutrons

Substitute \(A = 19\) and \(p = 9\) into the formula \(n=A - p\). So, \(n=19 - 9=10\).

Answer:

10