Question

The number of which subatomic particle(s) is same in case of the chlorine atom and chloride ion:

• A. Electron
• B. Proton
• C. Neutron
• D. All of the above

Answer 1

Answer: (B), (C)

The correct options are
B Proton
C Neutron

The number of protons and neutrons are the same in case of a chlorine atom ($Cl$) and chloride ion ($C{l}^{-}$).

Ions are formed when electrons are removed or added so there would be change in the number of electrons not in the number of protons and neutrons.