• # question_answer 86) The difference in ${{\,}_{17}}C{{l}^{35}}$and ${{\,}_{17}}C{{l}^{37}}$is of A)  Atomic numberB)  Number of neutronC)  Number of protonD)  Number of electron

[b]${{\,}_{17}}C{{l}^{35}}$and${{\,}_{17}}C{{l}^{37}}$are isotopes of chlorine. They have, Same atomic number (17). Same number of electron. Number of proton = Number of electron. Same number of protons (17). Different mass number. Different number of neutrons. [Mass number = number of (p + n)] Hence, the correct option is [b].