Question

Arrange the following in order of increasing radius: O2-, F- , Ne, Rb+, Br-

Answer 1

The order of increasing radius : Ne < F- < O2- < Rb+ < Br-

✅Key Concepts:

• The ionic radii of the Isoelectronic species increase with the negative charge on them.
• It increases down a group due to the addition of shells and decreases in a period due to an increase in the effective nuclear charge.
• The distance between the center and the outermost electron in an ion is called its ionic radius.

Step-by-step explanation:

• O2-, F- and Ne are Isoelectronic with 10 electrons, so their order is Ne < F- < O2-
• Among Rb+ and Br-, Br- is larger due to a large charge.
• Thus, the over all order is : Ne < F- < O2- < Rb+ < Br-