Arrange the atoms and ions in order of increasing radius.

R b^{+} < K r < B r^{-}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B r^{-} < K r < R b^{+}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

K r < B r^{-} < R b^{+}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

K r < R b^{+} < B r^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $R b^{+} < K r < B r^{-}$
${R b}^{+}, K r, {B r}^{-}$ are iso electronic. For iso electronic species the size of atom (ion decreases with increasing atomic number as number of protons increase and thus the force on electrons also increases and hence the size decreases. Thus correct order is ${R b}^{+} < K r < {B r}^{-}$ i.e., option A.

Suggest Corrections

Similar questions

[K r] 5 s^{2}

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is:

The increasing order of reactivity among group 1 elements is Li < Na < K < Rb CI > Br > I. Explain.

Join BYJU'S Learning Program