?

Free Version
Difficult

# Photoelectron Spectroscopy and Ionization Energy

APCHEM-XNFKGG

Which of the following group 1 elements would show a photoelectron spectrum (PES) peak at the LONGEST wavelength for the removal of the HIGHEST energy electron?

A

Lithium ($Li$).

B

Sodium ($Na$).

C

Potassium ($K$).

D

Rubidium ($Rb$).