Here's how to determine the number of protons, neutrons, and electrons in Chlorine-35:

* Protons: The number of protons defines the element. Chlorine (Cl) always has 17 protons.

* Neutrons: The atomic mass (35) represents the total number of protons and neutrons. To find the number of neutrons, subtract the number of protons from the atomic mass: 35 - 17 = 18 neutrons.

* Electrons: In a neutral atom, the number of electrons is equal to the number of protons. Therefore, Chlorine-35 has 17 electrons.

Summary:

* Protons: 17

* Neutrons: 18

* Electrons: 17