Answer:
K < Fe < Br < Kr
Step-by-step explanation:
Given chemical elements;
Potassium
Iron
Bromine
Krypton
Problem; arrange in order of increasing electronegativity
Solution:
The electronegativity of an element measures the relative tendency with which the atoms of the element attracts valence electrons in the chemical bond.
To solve this problem, we are going to use values of electronegativity from the Pauling's electronegativity table of elements;
For;
Potassium = 0.8
Iron = 1.83
Bromine = 2.8
Krypton = 3.0
So;
K < Fe < Br < Kr