.5 @ 0. 3s2 3p 2P 3s2 3p 2P 1.5 @ 22970. 3s2 3p 2P 3s2 3p 2P 1.5 322730. 3s3p2 2D 3s3p2 2D 2.5 325780. 3s3p2 2D 3s3p2 2D .5 390810. 3s3p2 2S 3s3p2 2S .5 417690. 3s3p2 2P 3s3p2 2P 1.5 426590. 3s3p2 2P 3s3p2 2P 1.5 506230. 3s2 3d 2D 3s2 3d 2D 2.5 508760. 3s2 3d 2D 3s2 3d 2D 1.5 1901800. 3s2 4d 2D 3s2 4d 2D 2.5 1903600. 3s2 4d 2D 3s2 4d 2D 2.5 @ 2002800. 3s2 4f 2F 3s2 4f 2F 3.5 @ 2003200. 3s2 4f 2F 3s2 4f 2F