未發現元素列表

未發現元素是一些在元素周期表內，未被列出的元素。目前所有已被發現的人造元素，在未發現之前也都可被稱之為未發現元素，基於目前化學理論漸趨完備，我們可以依此對未發現元素作一些基本性質上的推論。由於理論推測最大的原子質子數不得超過210，故下表所列之預測元素就僅至第九週期；而截至2022年為止，最新發現（于2010年）之元素為鿬（Tennessine, Ts）^[1]，并经IUPAC正式承認，至此所有第七週期元素已经合成成功，下表不予以保留。

通常科學家用實驗室的所在地或名稱來命名新發現的元素，國際純粹與應用化學聯合會（IUPAC）亦會給予已發現之元素名稱正式的認可。但IUPAC為統一起見，對於所有未經核定但已發現或被預測的元素名稱一律依照IUPAC之命名法則制定暫定名稱，使用拉丁文數字頭以該元素之原子序來命名，如Biunseptium（Bus）便是由bi（二）- un（一）- sept（七）- ium（元素）四個字根組合而成，表示「元素217號」。詳細的法則請見IUPAC元素系統命名法。以下所列即為未發現元素的IUPAC暫定名稱。

未發現元素在週期表中的位置

目前實驗合成原子序最大的元素可能是第七週期的最後一個元素₁₁₈Og，而若發現了原子序数更大的元素則將被置於第八週期。根據格倫·西奧多·西博格於1969年提出的擴展元素週期表^[2]，在第八週期以後的週期中，將會有g區元素的出現，即有部份的元素會存在有g軌域的電子，然而第八週期以後的元素都尚未能被合成或發現，所以此理論迄今未能被驗證。

我們可以預測下表的g區元素可能位於f區元素的左方，下表先依主流予以採用︰

**擴展元素周期表**
（超重元素不一定依下表的次序排列）
族未定
週期未定	0 Nu 0號元素
	1																																18
1	1 H 氢	2																										13	14	15	16	17	2 He 氦
2	3 Li 锂	4 Be 铍																										5 B 硼	6 C 碳	7 N 氮	8 O 氧	9 F 氟	10 Ne 氖
3	11 Na 钠	12 Mg 镁																3	4	5	6	7	8	9	10	11	12	13 Al 铝	14 Si 硅	15 P 磷	16 S 硫	17 Cl 氯	18 Ar 氩
4	19 K 钾	20 Ca 钙																21 Sc 钪	22 Ti 钛	23 V 钒	24 Cr 铬	25 Mn 锰	26 Fe 铁	27 Co 钴	28 Ni 镍	29 Cu 铜	30 Zn 锌	31 Ga 镓	32 Ge 锗	33 As 砷	34 Se 硒	35 Br 溴	36 Kr 氪
5	37 Rb 铷	38 Sr 锶																39 Y 钇	40 Zr 锆	41 Nb 铌	42 Mo 钼	43 Tc 锝	44 Ru 钌	45 Rh 铑	46 Pd 钯	47 Ag 银	48 Cd 镉	49 In 铟	50 Sn 锡	51 Sb 锑	52 Te 碲	53 I 碘	54 Xe 氙
6	55 Cs 铯	56 Ba 钡		57 La 镧	58 Ce 铈	59 Pr 镨	60 Nd 钕	61 Pm 钷	62 Sm 钐	63 Eu 铕	64 Gd 钆	65 Tb 铽	66 Dy 镝	67 Ho 钬	68 Er 铒	69 Tm 铥	70 Yb 镱	71 Lu 镥	72 Hf 铪	73 Ta 钽	74 W 钨	75 Re 铼	76 Os 锇	77 Ir 铱	78 Pt 铂	79 Au 金	80 Hg 汞	81 Tl 铊	82 Pb 铅	83 Bi 铋	84 Po 钋	85 At 砹	86 Rn 氡
7	87 Fr 钫	88 Ra 镭		89 Ac 锕	90 Th 钍	91 Pa 镤	92 U 铀	93 Np 镎	94 Pu 鈽	95 Am 镅	96 Cm 锔	97 Bk 锫	98 Cf 锎	99 Es 锿	100 Fm 镄	101 Md 钔	102 No 锘	103 Lr 铹	104 Rf 𬬻	105 Db 𬭊	106 Sg 𬭳	107 Bh 𬭛	108 Hs 𬭶	109 Mt 鿏	110 Ds 𫟼	111 Rg 錀	112 Cn 鎶	113 Nh 鿭	114 Fl 𫓧	115 Mc 镆	116 Lv 𫟷	117 Ts 鿬	118 Og 鿫
8	119 Uue	120 Ubn	g區元素	141 Uqu	142 Uqb	143 Uqt	144 Uqq	145 Uqp	146 Uqh	147 Uqs	148 Uqo	149 Uqe	150 Upn	151 Upu	152 Upb	153 Upt	154 Upq	155 Upp	156 Uph	157 Ups	158 Upo	159 Upe	160 Uhn	161 Uhu	162 Uhb	163 Uht	164 Uhq
9	165 Uhp	166 Uhh																										167 Uhs	168 Uho	169 Uhe	170 Usn	171 Usu	172 Usb

						8	121 Ubu	122 Ubb	123 Ubt	124 Ubq	125 Ubp	126 Ubh	127 Ubs	128 Ubo	129 Ube	130 Utn	131 Utu	132 Utb	133 Utt	134 Utq	135 Utp	136 Uth	137 Uts	138 Uto	139 Ute	140 Uqn

					族未定
週期未定			分區未定		173 Ust	174 Usq	175 Usp	176 Ush	177 Uss	...

無電子

s區元素

p區元素

d區元素

ds區元素

f區元素

g區元素

超臨界原子^[3]

（未發現元素以較淺顔色顯示）

總覽

第8周期

原子序数	元素符號	IUPAC命名	族	電子組態	電子殼層	備註
119	Uue	Ununennium	s¹	[Uuo]8s¹	2, 8, 18, 32, 32, 18, 8, 1	推測電負度小於0.7。
120	Ubn	Unbinilium	s²	[Og]8s²	2, 8, 18, 32, 32, 18, 8, 2	³⁰⁴Ubn之中子數為幻數，有人推測其半衰期可能較長。
121	Ubu	Unbiunium	g¹	[Og]8s²8p1 1/2	2, 8, 18, 32, 32, 18, 8, 3	第一個g區元素。
122	Ubb	Unbibium	g²	[Og]7d¹8s²8p1 1/2	2, 8, 18, 32, 32, 18, 9, 3
123	Ubt	Unbitrium	g³	[Og]6f¹7d¹8s²8p1 1/2	2, 8, 18, 32, 32, 19, 9, 3
124	Ubq	Unbiquadium	g⁴	[Og]6f³8s²8p1 1/2	2, 8, 18, 32, 32, 21, 8, 3
125	Ubp	Unbipentium	g⁵	[Og]5g¹6f³8s²8p1 1/2	2, 8, 18, 32, 33, 21, 8, 3
126	Ubh	Unbihexium	g⁶	[Og]5g²6f²7d¹8s²8p1 1/2	2, 8, 18, 32, 34, 20, 9, 3	³¹⁰Ubh同時擁有中子數184、質子數126兩個幻數，推測可能是穩定元素島中半衰期最長的一個。
127	Ubs	Unbiseptium	g⁷	[Og]5g³6f²8s²8p2 1/2	2, 8, 18, 32, 35, 20, 8, 4
128	Ubo	Unbioctium	g⁸	[Og]5g⁴6f²8s²8p2 1/2	2, 8, 18, 32, 36, 20, 8, 4
129	Ube	Unbiennium	g⁹	[Og]5g⁵6f²8s²8p2 1/2	2, 8, 18, 32, 37, 20, 8, 4
130	Utn	Untrinilium	g¹⁰	[Og]5g⁶6f²8s²8p2 1/2	2, 8, 18, 32, 38, 20, 8, 4
131	Utu	Untriunium	g¹¹	[Og]5g⁷6f²8s²8p2 1/2	2, 8, 18, 32, 39, 20, 8, 4
132	Utb	Untribium	g¹²	[Og]5g⁸6f²8s²8p2 1/2	2, 8, 18, 32, 40, 20, 8, 4
133	Utt	Untritrium	g¹³	[Og]5g⁸6f³8s²8p2 1/2	2, 8, 18, 32, 40, 21, 8, 4
134	Utq	Untriquadium	g¹⁴	[Og]5g⁸6f⁴8s²8p2 1/2	2, 8, 18, 32, 40, 22, 8, 4
135	Utp	Untripentium	g¹⁵	[Og]5g⁹6f⁴8s²8p2 1/2	2, 8, 18, 32, 41, 22, 8, 4
136	Uth	Untrihexium	g¹⁶	[Og]5g¹¹6f³7d¹8s²8p2 1/2	2, 8, 18, 32, 42, 22, 8, 4
137	Uts	Untriseptium	g¹⁷	[Og]5g¹²6f³7d¹8s²8p2 1/2	2, 8, 18, 32, 43, 21, 9, 4	在波耳原子模型中，原子序超過137的原子在1s軌域的電子速度將超過光速^[4]；且根據狄拉克方程式，原子基態時的能量將成為虛數，為此費曼指出元素137可能是最後的一個元素，因此有人在非正式場合亦稱此元素為Feynmanium (Fy)^[5]。
138	Uto	Untrioctium	g¹⁸	[Og]5g¹²6f³7d¹8s²8p2 1/2	2, 8, 18, 32, 44, 21, 9, 4	由於在實際情況中須考慮到原子核電荷分布的極限，因此在更精確的計算中，非離子態元素原子序可能達173。
139	Ute	Untriennium	p¹	[Og]5g¹³6f²7d²8s²8p2 1/2	2, 8, 18, 32, 45, 20, 10, 4
140	Uqn	Unquadnilium	p²	[Og]5g¹⁴6f³7d¹8s²8p2 1/2	2, 8, 18, 32, 46, 21, 9, 4
141	Uqu	Unquadunium	f¹	[Og]5g¹⁵6f²7d²8s²8p2 1/2	2, 8, 18, 32, 47, 20, 10, 4
142	Uqb	Unquadbium	f²	[Og]5g¹⁶6f²7d²8s²8p2 1/2	2, 8, 18, 32, 48, 20, 10, 4
143	Uqt	Unquadtrium	f³	[Og]5g¹⁷6f²7d²8s²8p2 1/2	2, 8, 18, 32, 49, 20, 10, 4
144	Uqq	Unquadquadium	f⁴	[Og]5g¹⁸6f¹7d³8s²8p2 1/2	2, 8, 18, 32, 50, 19, 11, 4
145	Uqp	Unquadpentium	f⁵	[Og]5g¹⁸6f³7d²8s²8p2 1/2	2, 8, 18, 32, 50, 21, 10, 4
146	Uqh	Unquadhexium	f⁶	[Og]5g¹⁸6f⁴7d²8s²8p2 1/2	2, 8, 18, 32, 50, 22, 10, 4
147	Uqs	Unquadseptium	f⁷	[Og]5g¹⁸6f⁵7d²8s²8p2 1/2	2, 8, 18, 32, 50, 23, 10, 4
148	Uqo	Unquadoctium	f⁸	[Og]5g¹⁸6f⁶7d²8s²8p2 1/2	2, 8, 18, 32, 50, 24, 10, 4
149	Uqe	Unquadennium	f⁹	[Og]5g¹⁸6f⁶7d³8s²8p2 1/2	2, 8, 18, 32, 50, 24, 11, 4
150	Upn	Unpentnilium	f¹⁰	[Og]5g¹⁸6f⁶7d⁴8s²8p2 1/2	2, 8, 18, 32, 50, 24, 12, 6
151	Upu	Unpentunium	f¹¹	[Og]5g¹⁸6f⁸7d³8s²8p2 1/2	2, 8, 18, 32, 50, 26, 11, 4
152	Upb	Unpentbium	f¹²	[Og]5g¹⁸6f⁹7d³8s²8p2 1/2	2, 8, 18, 32, 50, 27, 11, 4
153	Upt	Unpenttrium	f¹³	[Og]5g¹⁸6f¹¹7d²8s²8p2 1/2	2, 8, 18, 32, 50, 29, 10, 4
154	Upq	Unpentquadium	f¹⁴	[Og]5g¹⁸6f¹²7d²8s²8p2 1/2	2, 8, 18, 32, 50, 30, 10, 4
155	Upp	Unpentpentium	d¹	[Og]5g¹⁸6f¹³7d²8s²8p2 1/2	2, 8, 18, 32, 50, 31, 10, 4
156	Uph	Unpenthexium	d²	[Og]5g¹⁸6f¹⁴7d²8s²8p2 1/2	2, 8, 18, 32, 50, 32, 10, 4
157	Ups	Unpentseptium	d³	[Og]5g¹⁸6f¹⁴7d³8s²8p2 1/2	2, 8, 18, 32, 50, 32, 11, 4
158	Upo	Unpentoctium	d⁴	[Og]5g¹⁸6f¹⁴7d⁴8s²8p2 1/2	2, 8, 18, 32, 50, 32, 12, 4
159	Upe	Unpentennium	d⁵	[Og]5g¹⁸6f¹⁴7d⁴8s²8p2 1/29s¹	2, 8, 18, 32, 50, 32, 12, 4, 1
160	Uhn	Unhexnilium	d⁶	[Og]5g¹⁸6f¹⁴7d⁵8s²8p2 1/29s¹	2, 8, 18, 32, 50, 32, 13, 4, 1
161	Uhu	Unhexunium	d⁷	[Og]5g¹⁸6f¹⁴7d⁶8s²8p2 1/29s¹	2, 8, 18, 32, 50, 32, 14, 4, 1
162	Uhb	Unhexbium	d⁸	[Og]5g¹⁸6f¹⁴7d⁸8s²8p2 1/2	2, 8, 18, 32, 50, 32, 16, 4
163	Uht	Unhextrium	d⁹	[Og]5g¹⁸6f¹⁴7d⁹8s²8p2 1/2	2, 8, 18, 32, 50, 32, 17, 4
164	Uhq	Unhexquadium	d¹⁰	[Og]5g¹⁸6f¹⁴7d¹⁰8s²8p2 1/2	2, 8, 18, 32, 50, 32, 18, 4

第9周期

無電子

可能不存在

原子序	元素符號	IUPAC命名	族	電子組態	電子殼層	備註
165	Uhp	Unhexpentium	s¹	[Uhq]9s¹	2, 8, 18, 32, 50, 32, 18, 4, 1	電負度確定小於0.7。
166	Uhh	Unhexhexium	s²	[Uhq]9s²	2, 8, 18, 32, 50, 32, 18, 4, 2
167	Uhs	Unhexseptium	p¹	[Uhq]9s²9p1 1/2	2, 8, 18, 32, 50, 32, 18, 4, 3
168	Uho	Unhexoctium	p²	[Uhq]9s²9p2 1/2	2, 8, 18, 32, 50, 32, 18, 4, 4
169	Uhe	Unhexennium	p³	[Uhq]8p1 3/29s²9p2 1/2	2, 8, 18, 32, 50, 32, 18, 5, 4
170	Usn	Unseptnilium	p⁴	[Uhq]8p2 3/29s²9p2 1/2	2, 8, 18, 32, 50, 32, 18, 6, 4
171	Usu	Unseptunium	p⁵	[Uhq]8p3 3/29s²9p2 1/2	2, 8, 18, 32, 50, 32, 18, 7, 4
172	Usb	Unseptbium	p⁶	[Uhq]8p4 3/29s²9p2 1/2	2, 8, 18, 32, 50, 32, 18, 8, 4

周期未定

多篇論文中對於其周期皆有不同表述之元素者，或者無論文或研究提到其周期者，列於此。

無電子

超臨界原子^[3]

可能不存在

原子序数	元素符號	IUPAC命名	族	電子組態	電子殼層	備註
0	Nu/Nt/n	Neutronium		無電子		零號元素
173	Ust	Unsepttrium	未知	[Usb]6g¹	2, 8, 18, 32, 50, 33, 18, 8, 4
184	Uoq	Unoctquadium	未知	[Usb] 6g⁵ 7f⁴ 8d³^[6]^[7]
245	Bqp	Biquadpentium	未知	理論計算表明，當Z=245時，2s軌域也將崩潰^[8]。

詳細列表

化學元素			元素分區	預測电子排布^[9]^[6]^[10]^[11]
119	Uue	Ununennium	s-block	[Og] 8s¹
120	Ubn	Unbinilium	s-block	[Og] 8s²
121	Ubu	Unbiunium	g-block	[Og] 8s² 8p1 1/2^[12]
122	Ubb	Unbibium	g-block	[Og] 8s² 8p2 1/2^[12] [Og] 7d¹ 8s² 8p1 1/2
123	Ubt	Unbitrium	g-block	[Og] 6f¹ 8s² 8p2 1/2^[13] [Og] 6f¹ 7d¹ 8s² 8p1 1/2^[14]^[12] [Og] 6f² 8s² 8p1 1/2 [Og] 8s² 8p2 1/2 8p1 3/2^[14]
124	Ubq	Unbiquadium	g-block	[Og] 6f² 8s² 8p2 1/2^[12]^[13] [Og] 6f³ 8s² 8p1 1/2
125	Ubp	Unbipentium	g-block	[Og] 6f⁴ 8s² 8p1 1/2^[12] [Og] 5g¹ 6f² 8s² 8p2 1/2^[13] [Og] 5g¹ 6f³ 8s² 8p1 1/2 [Og] 8s² 0.81(5g¹ 6f² 8p2 1/2) + 0.17(5g¹ 6f¹ 7d² 8p1 1/2) + 0.02(6f³ 7d¹ 8p1 1/2)
126	Ubh	Unbihexium	g-block	[Og] 5g¹ 6f⁴ 8s² 8p1 1/2^[12] [Og] 5g² 6f² 8s² 8p2 1/2^[13] [Og] 5g² 6f³ 8s² 8p1 1/2 [Og] 8s² 0.998(5g² 6f³ 8p1 1/2) + 0.002(5g² 6f² 8p2 1/2)
127	Ubs	Unbiseptium	g-block	[Og] 5g² 6f³ 8s² 8p2 1/2^[12] [Og] 5g³ 6f² 8s² 8p2 1/2^[13] [Og] 8s² 0.88(5g³ 6f² 8p2 1/2) + 0.12(5g³ 6f¹ 7d² 8p1 1/2)
128	Ubo	Unbioctium	g-block	[Og] 5g³ 6f³ 8s² 8p2 1/2^[12] [Og] 5g⁴ 6f² 8s² 8p2 1/2^[13] [Og] 8s² 0.88(5g⁴ 6f² 8p2 1/2) + 0.12(5g⁴ 6f¹ 7d² 8p1 1/2)
129	Ube	Unbiennium	g-block	[Og] 5g⁴ 6f³ 7d¹ 8s² 8p1 1/2 [Og] 5g⁴ 6f³ 8s² 8p2 1/2^[12]^[13] [Og] 5g⁵ 6f² 8s² 8p2 1/2 [Og] 5g⁴ 6f³ 7d¹ 8s² 8p1 1/2
130	Utn	Untrinilium	g-block	[Og] 5g⁵ 6f³ 7d¹ 8s² 8p1 1/2 [Og] 5g⁵ 6f³ 8s² 8p2 1/2^[12]^[13] [Og] 5g⁶ 6f² 8s² 8p2 1/2 [Og] 5g⁵ 6f³ 7d¹ 8s² 8p1 1/2
131	Utu	Untriunium	g-block	[Og] 5g⁶ 6f³ 8s² 8p2 1/2^[12]^[13] [Og] 5g⁷ 6f² 8s² 8p2 1/2 [Og] 8s² 0.86(5g⁶ 6f³ 8p2 1/2) + 0.14(5g⁶ 6f² 7d² 8p1 1/2)
132	Utb	Untribium	g-block	[Og] 5g⁷ 6f³ 8s² 8p2 1/2^[13] [Og] 5g⁸ 6f² 8s² 8p2 1/2
133	Utt	Untritrium	g-block	[Og] 5g⁸ 6f³ 8s² 8p2 1/2^[13]
134	Utq	Untriquadium	g-block	[Og] 5g⁸ 6f⁴ 8s² 8p2 1/2^[13]
135	Utp	Untripentium	g-block	[Og] 5g⁹ 6f⁴ 8s² 8p2 1/2^[13]
136	Uth	Untrihexium	g-block	[Og] 5g¹⁰ 6f⁴ 8s² 8p2 1/2^[13]
137	Uts	Untriseptium	g-block	[Og] 5g¹¹ 6f⁴ 8s² 8p2 1/2^[13]
138	Uto	Untrioctium	g-block	[Og] 5g¹² 6f⁴ 8s² 8p2 1/2^[13] [Og] 5g¹² 6f³ 7d¹ 8s² 8p2 1/2
139	Ute	Untriennium	g-block	[Og] 5g¹³ 6f³ 7d¹ 8s² 8p2 1/2^[13] [Og] 5g¹³ 6f² 7d² 8s² 8p2 1/2
140	Uqn	Unquadnilium	g-block	[Og] 5g¹⁴ 6f³ 7d¹ 8s² 8p2 1/2^[13] [Og] 5g¹⁵ 6f¹ 8s² 8p2 1/2 8p2 3/2
141	Uqu	Unquadunium	g-block	[Og] 5g¹⁵ 6f² 7d² 8s² 8p2 1/2^[13]
142	Uqb	Unquadbium	g-block	[Og] 5g¹⁶ 6f² 7d² 8s² 8p2 1/2^[13]
143	Uqt	Unquadtrium	f-block	[Og] 5g¹⁷ 6f² 7d² 8s² 8p2 1/2^[13]
144	Uqq	Unquadquadium	f-block	[Og] 5g¹⁸ 6f² 7d² 8s² 8p2 1/2^[13] [Og] 5g¹⁸ 6f¹ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁷ 6f² 7d³ 8s² 8p2 1/2 [Og] 8s² 0.95(5g¹⁷ 6f² 7d³ 8p2 1/2) + 0.05(5g¹⁷ 6f⁴ 7d¹ 8p2 1/2)
145	Uqp	Unquadpentium	f-block	[Og] 5g¹⁸ 6f³ 7d² 8s² 8p2 1/2^[13]
146	Uqh	Unquadhexium	f-block	[Og] 5g¹⁸ 6f⁴ 7d² 8s² 8p2 1/2^[13]
147	Uqs	Unquadseptium	f-block	[Og] 5g¹⁸ 6f⁵ 7d² 8s² 8p2 1/2^[13]
148	Uqo	Unquadoctium	f-block	[Og] 5g¹⁸ 6f⁶ 7d² 8s² 8p2 1/2^[13]
149	Uqe	Unquadennium	f-block	[Og] 5g¹⁸ 6f⁶ 7d³ 8s² 8p2 1/2^[13]
150	Upn	Unpentnilium	f-block	[Og] 5g¹⁸ 6f⁶ 7d⁴ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f⁷ 7d³ 8s² 8p2 1/2^[13]
151	Upu	Unpentunium	f-block	[Og] 5g¹⁸ 6f⁸ 7d³ 8s² 8p2 1/2^[13]
152	Upb	Unpentbium	f-block	[Og] 5g¹⁸ 6f⁹ 7d³ 8s² 8p2 1/2^[13]
153	Upt	Unpenttrium	f-block	[Og] 5g¹⁸ 6f¹⁰ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹¹ 7d² 8s² 8p2 1/2^[13]
154	Upq	Unpentquadium	f-block	[Og] 5g¹⁸ 6f¹¹ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹² 7d² 8s² 8p2 1/2^[13]
155	Upp	Unpentpentium	f-block	[Og] 5g¹⁸ 6f¹² 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹³ 7d² 8s² 8p2 1/2^[13]
156	Uph	Unpenthexium	f-block	[Og] 5g¹⁸ 6f¹³ 7d³ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d² 8s² 8p2 1/2^[13]
157	Ups	Unpentseptium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d³ 8s² 8p2 1/2^[13]
158	Upo	Unpentoctium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p2 1/2^[13]
159	Upe	Unpentennium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁵ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁴ 8s² 8p2 1/2 9s¹^[13]
160	Uhn	Unhexnilium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁶ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁵ 8s² 8p2 1/2 9s¹^[13]
161	Uhu	Unhexunium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁷ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁶ 8s² 8p2 1/2 9s¹^[13]
162	Uhb	Unhexbium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁸ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁷ 8s² 8p2 1/2 9s¹^[13]
163	Uht	Unhextrium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d⁹ 8s² 8p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d⁸ 8s² 8p2 1/2 9s¹^[13]
164	Uhq	Unhexquadium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2^[13]
165	Uhp	Unhexpentium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s¹^[13]
166	Uhh	Unhexhexium	d-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s²^[13]
167	Uhs	Unhexseptium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s² 9p1 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p1 3/2 9s²^[13]
168	Uho	Unhexoctium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p2 3/2 9s²^[13]
169	Uhe	Unhexennium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p1 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p3 3/2 9s²^[13]
170	Usn	Unseptnilium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p2 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s²^[13]
171	Usu	Unseptunium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p3 3/2 9s² 9p2 1/2 [Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s² 9p1 1/2^[13]
172	Usb	Unseptbium	p-block	[Og] 5g¹⁸ 6f¹⁴ 7d¹⁰ 8s² 8p2 1/2 8p4 3/2 9s² 9p2 1/2^[13]
173	Ust	Unsepttrium	?	[172] 6g¹ [172] 9p1 3/2
...	...	...	...	...
184	Uoq	Unoctquadium	?	[172] 6g⁵ 7f⁴ 8d³

廢棄的元素名稱

無電子

原子序数	元素符號	IUPAC命名	族	研究年分	備註
43	Il	Ilmenium	7族元素	1846年^[15]	鈮和鉭的混合物
43	Lc	Lucium	7族元素	1896年^[16]^[17]	含雜質的釔混合物
90	Io	Ionium	錒系元素	1904年^[18]	釷-230
93	Ao	Ausonium	錒系元素	1934年^[19]	鋇、氪等元素的混合物
未知	Di	Didymium	鑭系元素	1841年^[20]	鐠和釹的混合物^[21]
未知	Nl^{[來源請求]}	𰚼	未知	1864年^[22]	雙電離氧O²⁺产生的禁线^[23]
未知	Pe	Pelopium	未知	1845年^[24]^[25]^[26]	鈮和鉭的混合物

參見

參考文獻

^ Tennessine - Element information, properties and uses | Periodic Table. www.rsc.org. [2024-09-19].
^ An Early History of LBNL by Dr. Glenn T. Seaborg. [2009-10-28]. （原始内容存档于2009-08-13）.
^ ^3.0 ^3.1 Marrus, Richard. Physics of Highly-Ionized Atoms. Springer Science & Business Media. 2012-12-06: 42-43 [2018-09-08]. ISBN 978-1-4613-0833-1. （原始内容存档于2021-04-28）（英语）.
^ Eisberg, Robert; Resnick, Robert; Brown, Judith. Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles. Physics Today. 1986-03-XX, 39 (3): 110–111. ISSN 0031-9228. doi:10.1063/1.2814935 （英语）. 请检查|date=中的日期值 (帮助)
^ J. Eric Slone. The Mysterious 137. fotuva.org. [2017-07-17]. （原始内容存档于2017-07-24）.
^ ^6.0 ^6.1 Fricke, Burkhard. Superheavy elements a prediction of their chemical and physical properties. Recent Impact of Physics on Inorganic Chemistry 21. Berlin, Heidelberg: Springer Berlin Heidelberg. 1975: 89–144. ISBN 978-3-540-07109-9. doi:10.1007/bfb0116498 （英语）.
^ Penneman, R.A.; Mann, J.B.; Jørgensen, C.K. Speculations on the chemistry of superheavy elements such as Z = 164. Chemical Physics Letters. 1971-02-XX, 8 (4): 321–326 [2021-04-25]. Bibcode:1971CPL.....8..321P. doi:10.1016/0009-2614(71)80054-4. （原始内容存档于2018-06-03）（英语）. 请检查|date=中的日期值 (帮助)
^ Reinhardt, Joachim; Greiner, Walter. Probing Supercritical Fields with Real and with Artificial Nuclei. Greiner, Walter (编). Nuclear Physics: Present and Future. Cham: Springer International Publishing. 2015: 195–210. ISBN 978-3-319-10198-9. doi:10.1007/978-3-319-10199-6_19 （英语）.
^ Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria. Transactinides and the future elements. Morss; Edelstein, Norman M.; Fuger, Jean (编). The Chemistry of the Actinide and Transactinide Elements 3rd. Dordrecht, The Netherlands: Springer Science+Business Media. 2006. ISBN 978-1-4020-3555-5.
^ Fricke, Burkhard. Dirac–Fock–Slater calculations for the elements Z = 100, fermium, to Z = 173 (PDF). Recent Impact of Physics on Inorganic Chemistry. 1977, 19: 83–192 [25 February 2016]. Bibcode:1977ADNDT..19...83F. doi:10.1016/0092-640X(77)90010-9. （原始内容 (PDF)存档于2016-03-22）.
^ Nefedov, V.I.; Trzhaskovskaya, M.B.; Yarzhemskii, V.G. Electronic Configurations and the Periodic Table for Superheavy Elements (PDF). Doklady Physical Chemistry. 2006, 408 (2): 149–151 [2022-04-20]. ISSN 0012-5016. S2CID 95738861. doi:10.1134/S0012501606060029. （原始内容 (PDF)存档于2016-10-13）.
^ ^12.00 ^12.01 ^12.02 ^12.03 ^12.04 ^12.05 ^12.06 ^12.07 ^12.08 ^12.09 ^12.10 Umemoto, Koichiro; Saito, Susumu. Electronic Configurations of Superheavy Elements. Journal of the Physical Society of Japan. 1996, 65 (10): 3175–9 [31 January 2021]. Bibcode:1996JPSJ...65.3175U. doi:10.1143/JPSJ.65.3175. （原始内容存档于2021-03-06）.
^ ^13.00 ^13.01 ^13.02 ^13.03 ^13.04 ^13.05 ^13.06 ^13.07 ^13.08 ^13.09 ^13.10 ^13.11 ^13.12 ^13.13 ^13.14 ^13.15 ^13.16 ^13.17 ^13.18 ^13.19 ^13.20 ^13.21 ^13.22 ^13.23 ^13.24 ^13.25 ^13.26 ^13.27 ^13.28 ^13.29 ^13.30 ^13.31 ^13.32 ^13.33 ^13.34 ^13.35 ^13.36 ^13.37 ^13.38 ^13.39 ^13.40 ^13.41 ^13.42 ^13.43 ^13.44 ^13.45 ^13.46 ^13.47 ^13.48 ^13.49 Archived copy. www.primefan.ru. [15 January 2022]. （原始内容存档于5 March 2016）.
^ ^14.0 ^14.1 van der Schoor, K. Electronic structure of element 123 (PDF) (学位论文). Rijksuniversiteit Groningen. 2016 [2022-04-20]. （原始内容 (PDF)存档于2019-01-13）.
^ Hermann, R. Untersuchungen über das Ilmenium. Journal für Praktische Chemie. 1847, 40 (1): 457–480. doi:10.1002/prac.184704001110 （英语）.
^ Referate. Zeitschrift für anorganische Chemie. 1897, 15 (1): 456–476. ISSN 0863-1778. doi:10.1002/zaac.18970150164 （德语）.
^ H., J. L. NOTES ON INORGANIC CHEMISTRY. Science. 1896-11-27, 4 (100): 790–791. Bibcode:1896Sci.....4..790H. ISSN 0036-8075. PMID 17734842. doi:10.1126/science.4.100.790-a （英语）.
^ Rayner-Canham, Marelene F.; Rayner-Canham, Geoffrey. A Devotion to Their Science: Pioneer Women of Radioactivity. 化學遺產基金會（英语：Chemical Heritage Foundation）. 1997: 152–155 [2019-02-24]. ISBN 978-0-941901-15-4. （原始内容存档于2019-12-08）（英语）.
^ Fermi, Prof. E. Possible Production of Elements of Atomic Number Higher than 92. Nature. 1934-06-XX, 133 (3372): 898–899 [2021-04-25]. Bibcode:1934Natur.133..898F. ISSN 0028-0836. doi:10.1038/133898a0. （原始内容存档于2021-10-17）（英语）. 请检查|date=中的日期值 (帮助)
^ Emsley, John. Nature's building blocks: an A–Z guide to the elements. Oxford University Press. 2003: 341. ISBN 0-19-850340-7.
^ Fontani, Marco; Costa, Mariagrazia; Orna, Mary Virginia. The Lost Elements: The Periodic Table's Shadow Side. Oxford University Press. 2015: 172–173 [2021-04-25]. ISBN 978-0-19-938334-4. （原始内容存档于2021-04-18）.
^ XIII. On the spectra of some of the nebulœ. A supplement to the paper “On the spectra of some of the fixed stars. Philosophical Transactions of the Royal Society of London. 1864-12-31, 154: 437–444 [2021-04-25]. Bibcode:1864RSPT..154..437H. ISSN 0261-0523. JSTOR 108876. doi:10.1098/rstl.1864.0013. （原始内容存档于2021-12-25）（英语）.
^ Bowen, I. S. The Origin of the Nebulium Spectrum. Nature. 1927-10-XX, 120 (3022): 473–473 [2021-04-25]. Bibcode:1927Natur.120..473B. ISSN 0028-0836. doi:10.1038/120473a0. （原始内容存档于2021-12-24）（英语）. 请检查|date=中的日期值 (帮助)
^ Rose, H. On a new metal, pelopium, contained in the Bavarian tantalite. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 1846-11-XX, 29 (195): 409–416. ISSN 1941-5966. doi:10.1080/14786444608645529 （英语）. 请检查|date=中的日期值 (帮助)
^ Rose, H. On two new metals, pelopium and niobium, discovered in the bavarian tantalites. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 1845-02-XX, 26 (171): 179–181. ISSN 1941-5966. doi:10.1080/14786444508562692 （英语）. 请检查|date=中的日期值 (帮助)
^ Niobium und Pelopium. Annalen der Chemie und Pharmacie. 1846, 60 (2): 206–208. doi:10.1002/jlac.18460600233 （德语）.

[1] Tennessine - Element information, properties and uses | Periodic Table. www.rsc.org. [2024-09-19].

[2] An Early History of LBNL by Dr. Glenn T. Seaborg. [2009-10-28]. （原始内容存档于2009-08-13）.

[marrus2012physics-3] 3.0 ^3.1 Marrus, Richard. Physics of Highly-Ionized Atoms. Springer Science & Business Media. 2012-12-06: 42-43 [2018-09-08]. ISBN 978-1-4613-0833-1. （原始内容存档于2021-04-28）（英语）.

[4] Eisberg, Robert; Resnick, Robert; Brown, Judith. Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles. Physics Today. 1986-03-XX, 39 (3): 110–111. ISSN 0031-9228. doi:10.1063/1.2814935 （英语）. 请检查|date=中的日期值 (帮助)

[The_Mysterious_137-5] J. Eric Slone. The Mysterious 137. fotuva.org. [2017-07-17]. （原始内容存档于2017-07-24）.

[BFricke-6] 6.0 ^6.1 Fricke, Burkhard. Superheavy elements a prediction of their chemical and physical properties. Recent Impact of Physics on Inorganic Chemistry 21. Berlin, Heidelberg: Springer Berlin Heidelberg. 1975: 89–144. ISBN 978-3-540-07109-9. doi:10.1007/bfb0116498 （英语）.

[Penneman-7] Penneman, R.A.; Mann, J.B.; Jørgensen, C.K. Speculations on the chemistry of superheavy elements such as Z = 164. Chemical Physics Letters. 1971-02-XX, 8 (4): 321–326 [2021-04-25]. Bibcode:1971CPL.....8..321P. doi:10.1016/0009-2614(71)80054-4. （原始内容存档于2018-06-03）（英语）. 请检查|date=中的日期值 (帮助)

[8] Reinhardt, Joachim; Greiner, Walter. Probing Supercritical Fields with Real and with Artificial Nuclei. Greiner, Walter (编). Nuclear Physics: Present and Future. Cham: Springer International Publishing. 2015: 195–210. ISBN 978-3-319-10198-9. doi:10.1007/978-3-319-10199-6_19 （英语）.

[Haire-9] Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria. Transactinides and the future elements. Morss; Edelstein, Norman M.; Fuger, Jean (编). The Chemistry of the Actinide and Transactinide Elements 3rd. Dordrecht, The Netherlands: Springer Science+Business Media. 2006. ISBN 978-1-4020-3555-5.

[BFricke1977-10] Fricke, Burkhard. Dirac–Fock–Slater calculations for the elements Z = 100, fermium, to Z = 173 (PDF). Recent Impact of Physics on Inorganic Chemistry. 1977, 19: 83–192 [25 February 2016]. Bibcode:1977ADNDT..19...83F. doi:10.1016/0092-640X(77)90010-9. （原始内容 (PDF)存档于2016-03-22）.

[nefedov-11] Nefedov, V.I.; Trzhaskovskaya, M.B.; Yarzhemskii, V.G. Electronic Configurations and the Periodic Table for Superheavy Elements (PDF). Doklady Physical Chemistry. 2006, 408 (2): 149–151 [2022-04-20]. ISSN 0012-5016. S2CID 95738861. doi:10.1134/S0012501606060029. （原始内容 (PDF)存档于2016-10-13）.

[Umemoto-12] 12.00 ^12.01 ^12.02 ^12.03 ^12.04 ^12.05 ^12.06 ^12.07 ^12.08 ^12.09 ^12.10 Umemoto, Koichiro; Saito, Susumu. Electronic Configurations of Superheavy Elements. Journal of the Physical Society of Japan. 1996, 65 (10): 3175–9 [31 January 2021]. Bibcode:1996JPSJ...65.3175U. doi:10.1143/JPSJ.65.3175. （原始内容存档于2021-03-06）.

[econfig-13] 13.00 ^13.01 ^13.02 ^13.03 ^13.04 ^13.05 ^13.06 ^13.07 ^13.08 ^13.09 ^13.10 ^13.11 ^13.12 ^13.13 ^13.14 ^13.15 ^13.16 ^13.17 ^13.18 ^13.19 ^13.20 ^13.21 ^13.22 ^13.23 ^13.24 ^13.25 ^13.26 ^13.27 ^13.28 ^13.29 ^13.30 ^13.31 ^13.32 ^13.33 ^13.34 ^13.35 ^13.36 ^13.37 ^13.38 ^13.39 ^13.40 ^13.41 ^13.42 ^13.43 ^13.44 ^13.45 ^13.46 ^13.47 ^13.48 ^13.49 Archived copy. www.primefan.ru. [15 January 2022]. （原始内容存档于5 March 2016）.

[e123-14] 14.0 ^14.1 van der Schoor, K. Electronic structure of element 123 (PDF) (学位论文). Rijksuniversiteit Groningen. 2016 [2022-04-20]. （原始内容 (PDF)存档于2019-01-13）.

[15] Hermann, R. Untersuchungen über das Ilmenium. Journal für Praktische Chemie. 1847, 40 (1): 457–480. doi:10.1002/prac.184704001110 （英语）.

[16] Referate. Zeitschrift für anorganische Chemie. 1897, 15 (1): 456–476. ISSN 0863-1778. doi:10.1002/zaac.18970150164 （德语）.

[17] H., J. L. NOTES ON INORGANIC CHEMISTRY. Science. 1896-11-27, 4 (100): 790–791. Bibcode:1896Sci.....4..790H. ISSN 0036-8075. PMID 17734842. doi:10.1126/science.4.100.790-a （英语）.

[Devotion-18] Rayner-Canham, Marelene F.; Rayner-Canham, Geoffrey. A Devotion to Their Science: Pioneer Women of Radioactivity. 化學遺產基金會（英语：Chemical Heritage Foundation）. 1997: 152–155 [2019-02-24]. ISBN 978-0-941901-15-4. （原始内容存档于2019-12-08）（英语）.

[Fermi-19] Fermi, Prof. E. Possible Production of Elements of Atomic Number Higher than 92. Nature. 1934-06-XX, 133 (3372): 898–899 [2021-04-25]. Bibcode:1934Natur.133..898F. ISSN 0028-0836. doi:10.1038/133898a0. （原始内容存档于2021-10-17）（英语）. 请检查|date=中的日期值 (帮助)

[e341-20] Emsley, John. Nature's building blocks: an A–Z guide to the elements. Oxford University Press. 2003: 341. ISBN 0-19-850340-7.

[b1-21] Fontani, Marco; Costa, Mariagrazia; Orna, Mary Virginia. The Lost Elements: The Periodic Table's Shadow Side. Oxford University Press. 2015: 172–173 [2021-04-25]. ISBN 978-0-19-938334-4. （原始内容存档于2021-04-18）.

[22] XIII. On the spectra of some of the nebulœ. A supplement to the paper “On the spectra of some of the fixed stars. Philosophical Transactions of the Royal Society of London. 1864-12-31, 154: 437–444 [2021-04-25]. Bibcode:1864RSPT..154..437H. ISSN 0261-0523. JSTOR 108876. doi:10.1098/rstl.1864.0013. （原始内容存档于2021-12-25）（英语）.

[23] Bowen, I. S. The Origin of the Nebulium Spectrum. Nature. 1927-10-XX, 120 (3022): 473–473 [2021-04-25]. Bibcode:1927Natur.120..473B. ISSN 0028-0836. doi:10.1038/120473a0. （原始内容存档于2021-12-24）（英语）. 请检查|date=中的日期值 (帮助)

[24] Rose, H. On a new metal, pelopium, contained in the Bavarian tantalite. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 1846-11-XX, 29 (195): 409–416. ISSN 1941-5966. doi:10.1080/14786444608645529 （英语）. 请检查|date=中的日期值 (帮助)

[25] Rose, H. On two new metals, pelopium and niobium, discovered in the bavarian tantalites. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 1845-02-XX, 26 (171): 179–181. ISSN 1941-5966. doi:10.1080/14786444508562692 （英语）. 请检查|date=中的日期值 (帮助)

[26] Niobium und Pelopium. Annalen der Chemie und Pharmacie. 1846, 60 (2): 206–208. doi:10.1002/jlac.18460600233 （德语）.

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