The most-missed elements

The 2026 Element Miss List

Name: The 2026 Element Miss List
Creator: Periodic Mole

Which of the 118 elements can people actually name? This page counts every legitimate answer given on Periodic Mole — start with the periodic table quiz. So far: 9,199 answers — 8,944 from gameplay, 255 from the quiz.

Take the quiz Download the data (Excel)How the numbers work

The leaderboard

Every element, ranked by real answers — typed quiz answers and in-game identification alike. Quiz answers count once per element per device per day; game answers tally every attempt, the way learning actually happens.

All 118 elements · sorted by miss rate

#
1	Protactinium	91	97	61	36	37%	palladium
2	Praseodymium	59	114	77	37	32%	protactinium
3	Moscovium	115	68	51	17	25%
4	Rhenium	75	78	61	17	22%
5	Ruthenium	44	66	52	14	21%
6	Phosphorus	15	108	86	22	20%
7	Flerovium	114	60	48	12	20%
8	Darmstadtium	110	56	45	11	20%	dysprosium
9	Thulium	69	82	66	16	20%
10	Tin	50	93	77	16	17%
11	Mendelevium	101	56	47	9	16%	molybdenum
12	Thallium	81	63	53	10	16%
13	Sodium	11	245	207	38	16%
14	Rubidium	37	80	69	11	14%
15	Nihonium	113	56	49	7	13%
16	Lawrencium	103	54	48	6	11%
17	Carbon	6	243	217	26	11%
18	Nitrogen	7	220	197	23	10%	nickel
19	Copernicium	112	48	43	5	10%
20	Tellurium	52	50	45	5	10%
21	Neodymium	60	53	48	5	9%
22	Potassium	19	85	77	8	9%
23	Fluorine	9	229	208	21	9%
24	Calcium	20	99	90	9	9%
25	Boron	5	221	202	19	9%
26	Antimony	51	71	65	6	8%
27	Hydrogen	1	236	217	19	8%
28	Beryllium	4	224	206	18	8%
29	Gadolinium	64	50	46	4	8%
30	Bohrium	107	50	46	4	8%
31	Gallium	31	64	59	5	8%
32	Neon	10	218	202	16	7%
33	Silver	47	84	78	6	7%	argon
34	Manganese	25	71	66	5	7%
35	Mercury	80	72	67	5	7%
36	Astatine	85	61	57	4	7%
37	Thorium	90	46	43	3	7%
38	Curium	96	46	43	3	7%
39	Iron	26	79	74	5	6%
40	Rhodium	45	49	46	3	6%
41	Dubnium	105	49	46	3	6%
42	Arsenic	33	50	47	3	6%
43	Terbium	65	52	49	3	6%
44	Chlorine	17	94	89	5	5%
45	Samarium	62	60	57	3	5%	tin
46	Promethium	61	41	39	2	5%
47	Magnesium	12	222	212	10	5%	manganese
48	Silicon	14	93	89	4	4%
49	Helium	2	211	202	9	4%
50	Californium	98	47	45	2	4%
51	Fermium	100	47	45	2	4%
52	Seaborgium	106	47	45	2	4%
53	Ytterbium	70	49	47	2	4%
54	Roentgenium	111	50	48	2	4%
55	Zirconium	40	55	53	2	4%
56	Radon	86	57	55	2	4%
57	Strontium	38	58	56	2	3%
58	Niobium	41	58	56	2	3%
59	Sulfur	16	90	87	3	3%
60	Cadmium	48	61	59	2	3%
61	Palladium	46	66	64	2	3%	lead
62	Titanium	22	68	66	2	3%
63	Platinum	78	72	70	2	3%
64	Zinc	30	73	71	2	3%
65	Nobelium	102	41	40	1	2%
66	Osmium	76	43	42	1	2%
67	Neptunium	93	43	42	1	2%
68	Nickel	28	87	85	2	2%
69	Lutetium	71	44	43	1	2%
70	Actinium	89	46	45	1	2%
71	Polonium	84	47	46	1	2%
72	Lithium	3	236	231	5	2%
73	Dysprosium	66	48	47	1	2%
74	Erbium	68	48	47	1	2%	europium
75	Indium	49	51	50	1	2%
76	Germanium	32	52	51	1	2%
77	Scandium	21	53	52	1	2%
78	Radium	88	53	52	1	2%
79	Berkelium	97	54	53	1	2%
80	Barium	56	56	55	1	2%
81	Yttrium	39	57	56	1	2%
82	Krypton	36	58	57	1	2%
83	Cobalt	27	66	65	1	2%
84	Oxygen	8	248	245	3	1%
85	Bromine	35	89	88	1	1%
86	Gold	79	104	104	0	0%
87	Copper	29	94	94	0	0%
88	Aluminum	13	88	88	0	0%
89	Argon	18	83	83	0	0%
90	Chromium	24	76	76	0	0%
91	Iodine	53	72	72	0	0%
92	Tungsten	74	66	66	0	0%
93	Lead	82	66	66	0	0%
94	Bismuth	83	65	65	0	0%
95	Vanadium	23	63	63	0	0%
96	Molybdenum	42	63	63	0	0%
97	Francium	87	57	57	0	0%
98	Selenium	34	56	56	0	0%
99	Uranium	92	56	56	0	0%
100	Hassium	108	52	52	0	0%
101	Americium	95	50	50	0	0%
102	Tennessine	117	49	49	0	0%
103	Holmium	67	47	47	0	0%
104	Livermorium	116	47	47	0	0%
105	Cesium	55	46	46	0	0%
106	Lanthanum	57	46	46	0	0%
107	Tantalum	73	46	46	0	0%
108	Xenon	54	45	45	0	0%
109	Cerium	58	45	45	0	0%
110	Iridium	77	45	45	0	0%
111	Oganesson	118	45	45	0	0%
112	Europium	63	44	44	0	0%
113	Hafnium	72	44	44	0	0%
114	Einsteinium	99	42	42	0	0%
115	Meitnerium	109	42	42	0	0%
116	Technetium	43	41	41	0	0%
117	Plutonium	94	40	40	0	0%
118	Rutherfordium	104	39	39	0	0%

Lookup demand

The quiz measures what people can name. This table measures what they look up: monthly views of each element's Wikipedia article, next to monthly searches for the element's name where we track it as a keyword. Views and searches are different units, so they stay in separate columns.

Element	Wikipedia views / month	Search volume / month
Au Gold	60,706	not tracked
Hg Mercury	47,885	not tracked
W Tungsten	45,683	not tracked
Al Aluminum	45,269	not tracked
Cu Copper	42,562	not tracked
H Hydrogen	41,961	not tracked
O Oxygen	41,317	not tracked
Ag Silver	37,918	not tracked
Fe Iron	36,815	not tracked
Pt Platinum	35,082	not tracked
S Sulfur	34,935	not tracked
Pb Lead	34,577	not tracked
U Uranium	34,500	not tracked
N Nitrogen	31,637	not tracked
Po Polonium	30,970	not tracked

The top 15. The Excel download has all 118.

See how students learn these

See if you can beat Cobalt in a game of Bond Forge, our take on dots and boxes with a chemistry learning twist. It's free to play with a starter set of elements, no account needed.

Play Bond Forge free