Learn all you should know about the Atomic Theory, an important topic in chemistry.
Protons 17 17
Electrons 17 17
Neutrons 20 18
The atoms : 37Cl and 35Cl are therefore said to be isotopes of the element 17 17 chlorine.
There are sometimes more them two types of atoms – isotopes for a particular element.
For example, carbon has three isotopes: 12C , 13C and 14C
6 6 6
The abundance of the isotopes vary. For example, for the element chlorine, 35Cl isotope is 75% abundant and 37Cl is 25% abundant. 17 17