Question

If $E_1,E_2,E_{3}and{E}_4$ are the energies required to knock off the 1st, 2nd, 3rd and 4th electron respectively from the outermost orbit of the Carbon atom, choose the correct option:

• A. $E_1$ > $E_2$ > $E_3$ > $E_4$
• B. $E_1$ < $E_2$ < $E_3$ < $E_4$
• C. $E_1$ < $E_2$ > $E_3$ < $E_4$
• D. $E_1$ < $E_2$ < $E_3$ > $E_4$

Answer 1

The correct option is B $E_1$ < $E_2$ < $E_3$ < $E_4$

It is easier to knock off the first electron in the outermost shell than knocking off the rest. More the number of electrons pulled out, higher is the nuclear pull on the remaining electrons, hence, more is the energy required to remove them.