* Electronegativity: Electronegativity is a measure of an atom's ability to attract electrons in a chemical bond.

* Periodic Trends: Electronegativity generally increases across a period (from left to right) and decreases down a group (from top to bottom) of the periodic table.

* Lithium and Krypton: Lithium (Li) is in Group 1 (alkali metals) and Krypton (Kr) is a noble gas.

* Lithium is relatively low on the periodic table and has a low electronegativity.

* Krypton is located on the far right of the periodic table and has a full valence shell, making it very stable and unreactive. This means it has a very low electronegativity.

In summary: Krypton has the lowest electronegativity value due to its position as a noble gas and its stable electronic configuration.