(i) What will be the maximum number of electrons which can be filled in Z-shell of an imaginary atomic model?
(ii) Why is it almost impossible to find such an atom in nature?
(i) According to Bohr and Bury rule, the maximum number of electrons in 2-shell (16th shell, starting from K)
${{2n}^{2}}$ =2x16x16= 512
(ii) Atom with greater number of electrons have greater number of protons and neutrons therefore they have unstable nucleus which radiates energy or divide into smaller stable nucleus.
Hence, elements with atomic number greater than 100 are rarely found in nature.