Choose the incorrect trend in the atomic radii $(\mathrm{r})$ of the elements :

Choose the incorrect trend in the atomic radii $(\mathrm{r})$ of the elements :
  1. $\mathrm{r}_{\mathrm{Br}} \lt \mathrm{r}_{\mathrm{K}}$
  2. $\mathrm{r}_{\mathrm{Mg}} \lt \mathrm{r}_{\mathrm{Al}}$
  3. $\mathrm{r}_{\mathrm{Rb}} \lt \mathrm{r}_{\mathrm{Cs}}$
  4. $\mathrm{r}_{\mathrm{Rb}} \lt \mathrm{r}_{\mathrm{Cs}}$

Solution

In a period from left to right atomic size decreases.

Asked in: JEE Main 2025 (07 Apr Shift 2)

Practice more Classification of Elements and Periodicity in Properties questions on Aicharya