Isotope is a phenomenon in which atoms of an element possess the same atomic number but different mesa number due to differences in the number of neutrons.
If the percentage abundance of chlorine is 25% of and the remaining Percentage is .
Calculate the relative atomic mass of chlorine.
25% of and the remaining percentage
= 100 – 25 = 75% of
So, Mass of CL = (25/100 x 37 + 75/100 x 35)
= (0.25 x 37) + (0.75 x 35)
The relative atomic mass = 35.5.
Note: It is Isotope that makes relative atomic masses of elements to have decimal points in them. An atom, which exhibits Isotopy, is termed lsotope.