Answer
Number of protons: 17
Number of neutrons in isotope Cl-35 is 18
Number of neutrons in isotope Cl-37 is 20.
Number of electrons in the neutral atoms is 17.
Work Step by Step
Atomic number (Z) is the number of protons in the nucleus of an atom.
Therefore the number of protons in chlorine is 17, the same with chlorine atomic number.
Number of neutrons is found by subtracting number of protons ( atomic number) from the mass number .
for Cl-35, number of neutrons = 35-17 = 18
for Cl-37, number of neutrons = 37-17 =20
Number of electrons in the neutral atoms is 17 as it is the same with the number of protons in nucleus ( remember atom is neutral).
