The element in period 4 of the Periodic Table with the highest electronegativity is krypton (2.96). The period 4 element with the lowest electronegativity is potassium (0.82).
Electronegativity
Krypton Tetrafluoride
The electronegativity increases
.8 Is the electronegativity of Potassium
Lithium has a lower electronegativity than krypton. The electronegativity for lithium is 0.98; the electronegativity for krypton is 3.0. Note that most noble gases in group 18 have no electronegativity at all since the do not make compounds. However, since krypton and xenon do make compounds under some circumstances, they do have a measurable electronegativity.
Lithium.
The element in period 4 of the Periodic Table with the highest electronegativity is krypton (2.96). The period 4 element with the lowest electronegativity is potassium (0.82).
It's a noble gas, so it doesn't react in normal conditions. Actually, it has some electronegativity value, but it's extremely low (as far as I know).
I do not think that Bromine behaves like Krypton in chemical reactions. Krypton is very unreactive due to the fact that it has a full stable set of valence electrons, and Bromine is extremly reactive and has high electronegativity because is does not have a full stable set of valence electrons. Although, I do suppose that if a Bromine atom were to become a negative ion (Br+1) by gaining another electron, it would act as if it were a Krypton atom.
Only one compound has been formed with krypton. Krypton is very nonreactive becuase it is a noble gas. Like all noble gasses, its valence electron shell is filled.It can react with flourine because flourine has the highest electronegativity of any element, making it highly reactive.
Electronegativity
Krypton Tetrafluoride
Pauling electronegativity 2.33 Sanderson electronegativity 2.29 Allred Rochow electronegativity 1.55 Mulliken-Jaffe electronegativity 2.41 (sp3 orbital) Allen electronegativity no data
electronegativity
You think probable to electronegativity.
No, krypton is odorless.