Question

1. Investigate: Select Na. In the Gizmo, the hydrogen atom is shown next to a positive charge. As you move the atom to the right, the force of attraction between the positive charge and the valence electron will increase until the electron is removed.

Answer 1

Element

H

Li

Na

K

Rb

Cs

Fr

Distance (no units)

472

222

206

163

148

110

100

Ionization energy (kJ/mol)

1312

520

496

419

403

376

380