Question

an atom of tin has an atomic number of 50 and a mass of 119. how many protons, neutrons, and electrons does this atom of tin contain and where is each particle located?

Explanation:

Step1: Determine protons and electrons

The atomic number \(Z\) of an element is equal to the number of protons (\(p\)) in its nucleus. For tin (\(Sn\)) with \(Z = 50\), the number of protons \(p=50\). In a neutral atom, the number of electrons (\(e\)) is equal to the number of protons. So \(e = 50\). Electrons are located in the electron - cloud surrounding the nucleus. Protons are located in the nucleus.

Step2: Calculate neutrons

The mass number \(A\) is given by \(A=p + n\) (where \(n\) is the number of neutrons). We know \(A = 119\) and \(p = 50\). Then \(n=A - p\). Substituting the values: \(n=119 - 50=69\). Neutrons are located in the nucleus.

Answer:

• Protons: \(50\), located in the nucleus.
• Neutrons: \(69\), located in the nucleus.
• Electrons: \(50\), located in the electron - cloud around the nucleus.