JEE Main 2003Annual, Paper 1PhysicsEasyAtoms and Nuclei183× since 2002Which of the following atoms has the lowest ionization potential ?AOption A. 714N{}_7^{14}N714NBOption B. 55133 Cs{}_{55}^{133}\,Cs55133CsCOption C. 1840 Ar{}_{18}^{40}\,Ar1840ArDOption D. 816 O{}_8^{16}\,O816OCheckSkip · show solution