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Among the species $B{r^ - }$, $Br$ , $B{r^ + }$ the smallest one in size is____A.$B{r^ - }$B.$Br$C.$B{r^ + }$D.None of these

Last updated date: 10th Sep 2024
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Hint: We have to remember that the measure of the size of the chemical elements are termed as the atomic radii. Atomic radii is the distance from the center of the nucleus to the boundary of the surrounding shells or electrons. In the early twentieth century the chemists discovered the atomic radii.

-Among $B{r^ - }$ , $Br$ , and $B{r^ + }$ , the $B{r^ - }$ means an extra electron is in the outermost shell. $B{r^ + }$ means an electron is removed from the bromine atom.
-$Br$ means neither an electron is added nor the electron is removed.
-In $B{r^ + }$ ion, the positive charge attracts the valence shell electrons and pulls their electrons closer so the radius of the atom is decreased.
-In $B{r^ - }$ ions, the negative charge of the bromine atom will be repelled. If the repulsion is more the size of the atom is increased. So the force of attraction between the nucleus and all the electrons are reduced so the size of the atom is increased.
So, option C, $B{r^ + }$ is the correct answer.