Table 1. Electronic Configuration for An IV and An III⁴³.

An	An IV	An III
Ac	[Hg]6p6	[Rn]7s
Th	[Rn]5f	[Rn]5f6d
Pa	[Rn]5f2	[Rn]5f26d
U	[Rn]5f3	[Rn]5f4
Np	[Rn]5f4	[Rn]5f5
Pu	[Rn]5f5	[Rn]5f6
Am	[Rn]5f6	[Rn]5f7
Cm	[Rn]5f7	[Rn]5f8
Bk	[Rn]5f8	[Rn]5f9
Cf	[Rn]5f9	[Rn]5f10
Es	[Rn]5f10	[Rn]5f11
Fm	[Rn]5f11	[Rn]5f12
Md	[Rn]5f12	[Rn]5f13
No	[Rn]5f13	[Rn]5f14
Lr	[Rn]5f14	[Rn]5f147s