Anomalous electronic configurations

In connection with the predicted configurations, please note that in mid-form tables Lutetium is generally represented as a Lanthanide, and Lawrencium likewise represented as an Actinide.

	Element	Predicted	Actual

Period 4	First (d) transition series
	Chromium	[Ar] 3d⁴ 4s²	[Ar] 3d⁵ 4s¹
	Copper	[Ar] 3d⁹ 4s²	[Ar] 3d¹⁰ 4s¹

Period 5	Second (d) transition series
	Niobium	[Kr] 4d³ 5s²	[Kr] 4d⁴ 5s¹
	Molybdenum	[Kr] 4d⁴ 5s²	[Kr] 4d⁵ 5s¹
	Ruthenium	[Kr] 4d⁶ 5s²	[Kr] 4d⁷ 5s¹
	Rhodium	[Kr] 4d⁷ 5s²	[Kr] 4d⁸ 5s¹
	Palladium	[Kr] 4d⁸ 5s²	[Kr] 4d¹⁰ 5s⁰
	Silver	[Kr] 4d⁹ 5s²	[Kr] 4d¹⁰ 5s¹

Period 6	Lanthanide (f) series
	Lanthanum	[Xe] 4f¹ 6s²	[Xe] 5d¹ 6s²
	Cerium	[Xe] 4f² 6s²	[Xe] 4f¹ 5d¹ 6s²
	Gadolinium	[Xe] 4f⁸ 6s²	[Xe] 4f⁷ 5d¹ 6s²

Period 6	Third (d) transition series
	Platinum	[Xe] 4f¹⁴ 5d⁸ 6s²	[Xe] 4f¹⁴ 5d⁹ 6s¹
	Gold	[Xe] 4f¹⁴ 5d⁹ 6s²	[Xe] 4f¹⁴ 5d¹⁰ 6s¹

Period 7	Actinide (f) series
	Actinium	[Rn] 5f¹ 7s²	[Rn] 6d¹ 7s²
	Thorium	[Rn] 5f² 7s²	[Rn] 6d² 7s²
	Protactinium	[Rn] 5f³ 7s²	[Rn] 5f² 6d¹ 7s²
	Uranium	[Rn] 5f⁴ 7s²	[Rn] 5f³ 6d¹ 7s²
	Neptunium	[Rn] 5f⁵ 7s²	[Rn] 5f⁴ 6d¹ 7s²
	Curium	[Rn] 5f⁸ 7s²	[Rn] 5f⁷ 6d¹ 7s²

NB	Helium		1s²
	Neon		[He] 2s² 2p⁶
	Argon		[Ne] 3s² 3p⁶
	Krypton		[Ar] 3d¹⁰ 4s² 4p⁶
	Xenon		[Kr] 4d¹⁰ 5s² 5p⁶
	Radon		[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶