P-1 Periodic Classification of Element — Science STD 10 — Question

Isotopes ${ }_{17}^{35} Cl$ and ${ }_{17}^{37} Cl$ occupy the same position in the modern periodic table. Both isotopes have the same atomic number.

In the modern periodic table, the elements are arranged in the order of their increasing atomic numbers, that the problem of discrepancy in the pairs of isotopes elements observed in Mendeleev's periodic table was solved. The isotopes of ${ }_{17}^{35} Cl$ and ${ }_{17}^{37} Cl$ were placed in the same group as both have the same atomic number.