PhysicsEasy183×since 2002Q5966Which of the following atoms has the lowest ionization potential ?A714N{}_7^{14}N714NB55133 Cs{}_{55}^{133}\,Cs55133CsC1840 Ar{}_{18}^{40}\,Ar1840ArD816 O{}_8^{16}\,O816OCheck answerSkip