Question

$C{l}^{35}$ and $C{l}^{37}$ are not different in their chemical properties because

• A. they have different mass number
• B. they have different number of electrons
• C. they have different number of protons
• D. they have the same number of electrons

Answer 1

The correct option is D they have the same number of electrons

Elements with same atomic number and different mass number are called isotopes. $C{l}^{35}$ and $C{l}^{37}$ are examples of isotopes. Both species have the same number of electrons(i.e, same atomic number) due to which there is no difference in chemical properties.