AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
Which one of the following order is correct for the first ionisation energies of the elements?
- A B < Be < N < O
- B Be < B < N < O
- C B < Be < O < N
- D B < O < Be < N
Answer & Solution
Correct Answer
(C) B < Be < O < N
Step-by-step Solution
Detailed explanation
First ionisation energy increases in a period. Thus, the first IE of the elements of the second period should be as follows \(\mathrm{Be} < \mathrm{B} < \mathrm{N} < \mathrm{O}\) But in practice, the elements do not follow the above order. The first IE of these elements is…
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