Arrange the following elements in increasing | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Atomic radius generally increases down a group and decreases across a period from left to right. $Na$ $(Z=11)$ and $Mg$ $(Z=12)$ belong to the $3^

Vedclass · Accepted Answer

$Mg < Na < K < Rb$

Vedclass · Answer

(B) Atomic radius generally increases down a group and decreases across a period from left to right. $Na$ $(Z=11)$ and $Mg$ $(Z=12)$ belong to the $3^{rd}$ period,while $K$ $(Z=19)$ and $Rb$ $(Z=37)$ belong to the $4^{th}$ and $5^{th}$ periods respectively. Across the $3^{rd}$ period,atomic radius decreases from $Na$ to $Mg$,so $Mg Down Group $1$,atomic radius increases as $Na Combining these trends,the order is $Mg < Na < K < Rb$.

Arrange the following elements in increasing order of their atomic radius: $Na$,$K$,$Mg$,$Rb$.

Similar Questions

On going down a main sub-group in the periodic table (example $Li$ to $Cs$ in $IA$ or $Be$ to $Ra$ in $IIA$),the expected trend of changes in atomic radius is a

The correct order of ionic radii for the ions $P^{3-}, S^{2-}, Ca^{2+}, K^{+}, Cl^{-}$ is:

The ion with the smallest radius among the following is:

How does atomic radius vary in a period and in a group? How do you explain the variation?

$Al^{3+}$ has a lower ionic radius than $Mg^{2+}$ because

Vedclass Test Series

Exam Paper Generator

Online Exam Module