Question

which of the following pairs are isotopes
^209X, ^232Z, ^210X, ^231Z
84 , 90. 84. 91


for class 9th chapter structure of the atoms

Answer 1

Answer:

^209 X 84 and ^210 X 84 are isotopes

Explanation:

^209 X 84 and ^210 X 84 are isotopes because isotopes are the atoms of the same element which have different mass number but same atomic number.