Argon Energy Ion Level 1 Level 2 (ev) 4280.0 AR XVIII 1 6 4230.0 AR XVIII 1 5 4130.0 AR XVIII 1 4 3910.0 AR XVIII 1 3 3870.0 AR XVII 1S2 1S 1S4P 1PO 3680.0 AR XVII 1S2 1S 1S3P 1PO 3300.0 AR XVIII 1 2 3140.0 AR XVII 1S2 1S 1S2P 1PO 3120.0 AR XVII 1S2 1S 1S2P 3PO 3110.0 AR XVII 1S2 1S 1S2S 3S 3090.0 AR XV 1S22S2 1S(0) 1S2S22P 979.0 AR XVIII 2 6 927.0 AR XVIII 2 5 826.0 AR XVIII 2 4 659.0 AR XV 1S22S2 1S(0) 1S22S4P 623.0 AR XV 1S22S2P 1PO 1S22S4L 612.0 AR XVIII 2 3 584.0 AR XIV 1S22S22P 2P(1/2)O 1S24D 556.0 AR XVII 1S2P 3PO 1S3D 3D 542.0 AR XVII 1S2P 1PO 1S3D 1D 525.0 AR XVI 1S22S 2S(1/2) 1S23P 496.0 AR XV 1S22S2P 1PO 1S22S3D 3D 496.0 AR XV 1S22S2 1S(0) 1S22S3P 1PO 453.0 AR XIV 1S22S22P 2P(1/2)O 1S23D 453.0 AR XV 1S22S2P 1PO 1S22S3D 1D 438.0 AR XV 1S22S2P 1PO 1S22S3S 1S 424.0 AR XIV 1S22S22P 2P(1/2)O 1S23S 405.0 AR XII 1S22S22P3 4S(3/2)O 1S22S22P23D 2L 394.0 AR XII 1S22S22P3 4S(3/2)O 1S22S22P23D 4L 380.0 AR X 1S22S22P5 2P(1/2)O 1S22S2P53P 366.0 AR XVIII 3 6 361.0 AR XI 1S22S22P4 3P(0) 1S22S22P33D 3PO 359.0 AR XI 1S22S22P4 3P(0) 1S22S22P33D 3DO 358.0 AR XII 1S22S22P3 4S(3/2)O 1S22S22P23S 2L 348.0 AR XII 1S22S22P3 4S(3/2)O 1S22S22P23S 4L 331.0 AR X 1S22S22P5 2P(1/2)O 1S22S22P43D 2F,2D 330.0 AR X 1S22S22P5 2P(1/2)O 1S22S22P43D 2S,2P 321.0 AR XI 1S22S22P4 3P(0) 1S22S22P33S 3DO,3PO 314.0 AR XVIII 3 5 312.0 AR XI 1S22S22P4 3P(0) 1S22S22P33S 3SO 299.0 AR IX 1S22S22P6 1S22S22P53D 3PO 280.0 AR X 1S22S22P5 2P(1/2)O 1S22S22P33S 275.0 AR X 1S22S2P6 1S22S2P53S 254.0 AR IX 1S22S22P6 1S22S22P53S 1PO 252.0 AR IX 1S22S22P6 1S22S22P53S 3PO 214.0 AR XVIII 3 4 152.0 AR XVIII 4 6 103.0 AR VIII 1S22S22P63S 3S(1/2) 1S22S22P65P 100.0 AR XVIII 4 5