Question

1. determine which of the following statements correctly compares cesium (cs) and lithium (li).

li has a larger atomic radius and is less electronegative and electronegativity
cs has a smaller atomic radius and higher ionization energy and electronegativity
li has a smaller atomic radius and lower ionization energy and electronegativity
cs has a larger atomic radius and lower ionization energy and electronegativity

Explanation:

Cesium (Cs) is lower in the alkali - metal group than lithium (Li) in the periodic table. Atomic radius increases down a group, so Cs has a larger atomic radius. Ionization energy decreases down a group as the outermost electron is farther from the nucleus and easier to remove, so Cs has lower ionization energy. Electronegativity also decreases down a group.

Answer:

Cs has a larger atomic radius and lower ionization energy and lower electronegativity.