Question

What is the relatioship between atomic numbers and ionic radii of the elements in Group 1? what is the relationship between atomic numbers and first ionization energies? The following are the elements in the Group 1 in the periodic table Lithium, Sodium,Potassium, Cesiumand Rubidium

Answer 1

As atomic number increases atomic radii also increase down group 1. ionisation energy down group 1 will also decrease because as atomic radii gets bigger there is less electrostatic force between nuclei and electrons so less energy needed to remove valence electron.