Question

(i) Why chemical properties of all the isotopes of an element are same?
(ii) Name the isotopes used in the treatment of goitre and cancer?
(iii) An element 'X' has 2 electrons in its M shell. What is its atomic number?​

Answer 1

Answer:

i ) The chemical properties of all the isotopes of an element are same because they have the same number of protons and electrons

ii ) The atomic number of the element 'x' will be 12 as tin he k shell max no. of electrons can be 2 , in L - 8 and in M there are 2 so 2 + 8 + 2 = 12

So the atomic number is 12