Question

If $E_1,E_2,E_{3}and{E}_4$ are the energies required to knock off the $1^{st},2^{nd},3^{rd}and{4}^{th}$ electrons (from the last shell) respectively from 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, more is the energy required.