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.role="math" localid="1652478920682" $\mathrm{Li},\mathrm{K},\mathrm{S},\mathrm{CI}$

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

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

Step-by-step solution

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,

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