To determine the total numbers of neutrons, protons, and electrons in the isotope 35Cl, we start by analyzing the symbol itself. Chlorine (Cl) has an atomic number of 17, which means it has 17 protons. Since 35Cl is an isotope of chlorine with a mass number of 35, we can find the number of neutrons by subtracting the number of protons from the mass number.
So, the calculation for neutrons is:
Neutrons = Mass number – Protons = 35 – 17 = 18 neutrons.
In a neutral atom, the number of electrons equals the number of protons. Therefore, 35Cl also has 17 electrons. To summarize:
- Protons: 17
- Neutrons: 18
- Electrons: 17
This leads us to the correct option (d) – 18 neutrons, 17 protons, and 17 electrons. However, none of the provided options seem to have the correct number of electrons listed accurately based on standard atomic structure concepts.