AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
Identify the element which has highest second ionisation enthalpy.
- A Carbon
- B Phosphorus
- C Nitrogen
- D Oxygen
Answer & Solution
Correct Answer
(D) Oxygen
Step-by-step Solution
Detailed explanation
As we move across a period, effective nuclear charge \(\left(Z_{\text {eff }}\right)\) increases and so do the ionisation energy and moving down a group, effective nuclear charge \(\left(Z_{\text {eff }}\right)\) decreases and so do the ionisation energy. So, phosphorus…
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