Question

Arrange the following in order of increasing radius: O2-, F- , Ne ,Rb ,Br- Group of answer choices O2- < F- < Ne < Rb < Br- Br- < Rb < Ne < F- < O2- F- < Br- < O2- < Ne < Rb F- < O2- < Ne < Br- < Rb Rb < F- < Br- < Ne

Answer 1

The arrangement in order of increasing radius is F⁻ < O²⁻ < Ne < Br⁻  < Rb

Atomic radius

This is the distance between the outermost electron and the nucleus

Electronic configuration of an atom

This is the arrangement of electrons around the nucleus

• The electronic configurations of the elements are given in increasing order of atomic radius below
• O - 2, 6 < F - 2, 7 < Ne - 2, 8 < Br - 2, 8, 18, 7 < Rb - 2, 8, 18, 8, 1

Ionic radius

This is the radius of an atom forming ionic bond

• Since we have anions in the question and the atomic radius of an anion is greater than that of the corresponding atom,

So, we have the electronic configurations of the corresponding ions in increasing order of ionic radius

F⁻ - 2, 8, < O²⁻ - 2, 8 < Ne - 2, 8 < Br⁻ - 2, 8, 18, 8 < Rb - 2, 8, 18, 8, 1

So, the arrangement in order of increasing radius is F⁻ < O²⁻ < Ne < Br⁻  < Rb

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