JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
Choose the incorrect trend in the atomic radius \((\mathrm{r})\) of the elements :
- A \(\mathrm{r}_{\mathrm{Br}} \lt \mathrm{r}_{\mathrm{K}}\)
- B \(\mathrm{r}_{\mathrm{Mg}} \lt \mathrm{r}_{\mathrm{Al}}\)
- C \(\mathrm{r}_{\mathrm{Rb}} \lt \mathrm{r}_{\mathrm{Cs}}\)
- D \(\mathrm{r}_{\mathrm{At}} \lt \mathrm{r}_{\mathrm{Cs}}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{r}_{\mathrm{Mg}} \lt \mathrm{r}_{\mathrm{Al}}\)
Step-by-step Solution
Detailed explanation
In a period from left to right atomic size decreases.
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