AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
The correct order of atomic radii of given elements is
- A \(\mathrm{B} \lt \mathrm{Be} \lt \mathrm{Mg}\)
- B \(\mathrm{Mg} \lt \mathrm{Be} \lt \mathrm{B}\)
- C \(\mathrm{Be} \lt \mathrm{B} \lt \mathrm{Mg}\)
- D \(\mathrm{B} \lt \mathrm{Mg} \lt \mathrm{Be}\)
Answer & Solution
Correct Answer
(A) \(\mathrm{B} \lt \mathrm{Be} \lt \mathrm{Mg}\)
Step-by-step Solution
Detailed explanation
In periodic table atomic radii decrease from left to right and increase from top to bottom. Mg is placed in 3 rd period and \(\mathrm{Be}, \mathrm{B}\) are in second period so, Mg have more atomic radii then Be and B .
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