Q. 6.129 - An Introduction to General, Organic, and Biological Chemistry

Question

Use the periodic table to arrange the following atoms in order of increasing electronegativity: ($6.7$) 

a. data-custom-editor="chemistry" $\mathrm{I}, \mathrm{F}, \mathrm{Cl}$

b.  $\mathrm{Li}, \mathrm{K}, \mathrm{S}, \mathrm{CI}$

c. data-custom-editor="chemistry" $\mathrm{Mg}, \mathrm{Sr}, \mathrm{Ba}, \mathrm{Be}$

Step-by-Step Solution

Answer

(a) The increasing order of electronegativity is $\mathrm{I}<\mathrm{Cl}<\mathrm{F}$

(b) The increasing order of electronegativity is $\mathrm{K}<\mathrm{Li}<\mathrm{S}<\mathrm{Cl}$

(c) The increasing order of electronegativity is $\mathrm{Ba}<\mathrm{Sr}<\mathrm{Mg}<\mathrm{Be}$

Part (a) Step 1: Given information

We need to find the increasing order of electronegativity 

Part (a) Step 2: Explanation

We know that

$\mathrm{I}, \mathrm{F}, \mathrm{Cl}$ all lie in the same group but different periods.

And electronegativity decreases as we move down the group

Therefore, increasing order of electronegativity is,

$\mathrm{I}<\mathrm{Cl}<\mathrm{F}$

Part (b) Step 1: Given information

We need to find the increasing order of electronegativity  

Part (b) Step 2: Explanation

We know that

Electronegativity increases as we go top-right 

Therefore, increasing order of electronegativity is,

$\mathrm{K}<\mathrm{Li}<\mathrm{S}<\mathrm{Cl}$

Part (c) Step 1: Given information

We need to find the increasing order of electronegativity  

Part (c) Step 2: Explanation

We know that

$\mathrm{Mg}, \mathrm{Sr}, \mathrm{Ba}, \mathrm{Be}$ all lie in the same group but different periods.

And electronegativity decreases as we move down the group 

Therefore, increasing order of electronegativity is,

$\mathrm{Ba}<\mathrm{Sr}<\mathrm{Mg}<\mathrm{Be}$