Question

Name the members of alkali metal group which has the lowest electronegativity

Answer 1

The Alkali metal group is the group 1 of the periodic table which has the following elements:

Hydrogen (H) Lithium (Li) Sodium (Na) Potassium (K) Rubidium (Rb) Cesium (Cs) Francium (Fr)

Electronegativity is the tendency of an atom to attract a shared pair of electrons.

Periodic trend:

The electronegativity decreases down the group and increase from left to right along a period.

According to this trend, the bottom-most atom should have the lowest electronegativity.

Hence, the answer is Cesium.

Francium is a radioactive element, so it is not considered.