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: 8,979 answers — 8,868 from gameplay, 111 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	96	61	35	36%	palladium
2	Praseodymium	59	113	77	36	32%	protactinium
3	Moscovium	115	67	50	17	25%
4	Ruthenium	44	65	51	14	22%
5	Rhenium	75	77	61	16	21%
6	Phosphorus	15	106	84	22	21%
7	Flerovium	114	59	47	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	Sodium	11	235	197	38	16%
12	Thallium	81	60	51	9	15%
13	Mendelevium	101	54	47	7	13%
14	Rubidium	37	79	69	10	13%
15	Lawrencium	103	53	47	6	11%
16	Nihonium	113	53	47	6	11%
17	Carbon	6	234	209	25	11%
18	Tellurium	52	49	44	5	10%
19	Nitrogen	7	211	190	21	10%
20	Potassium	19	83	75	8	10%
21	Calcium	20	98	89	9	9%
22	Fluorine	9	224	204	20	9%
23	Boron	5	214	196	18	8%
24	Bohrium	107	48	44	4	8%
25	Hydrogen	1	231	212	19	8%
26	Gadolinium	64	50	46	4	8%
27	Gallium	31	64	59	5	8%
28	Beryllium	4	219	202	17	8%
29	Antimony	51	70	65	5	7%
30	Mercury	80	70	65	5	7%
31	Neon	10	213	198	15	7%
32	Astatine	85	60	56	4	7%
33	Copernicium	112	46	43	3	7%
34	Iron	26	78	73	5	6%
35	Arsenic	33	49	46	3	6%
36	Silver	47	83	78	5	6%
37	Neodymium	60	51	48	3	6%
38	Manganese	25	69	65	4	6%
39	Chlorine	17	94	89	5	5%
40	Samarium	62	59	56	3	5%	tin
41	Promethium	61	41	39	2	5%
42	Thorium	90	44	42	2	5%
43	Californium	98	44	42	2	5%
44	Curium	96	45	43	2	4%
45	Fermium	100	45	43	2	4%
46	Helium	2	204	195	9	4%
47	Dubnium	105	46	44	2	4%
48	Ytterbium	70	47	45	2	4%
49	Magnesium	12	215	206	9	4%	manganese
50	Rhodium	45	48	46	2	4%
51	Terbium	65	51	49	2	4%
52	Radon	86	56	54	2	4%
53	Strontium	38	57	55	2	4%
54	Niobium	41	57	55	2	4%
55	Sulfur	16	88	85	3	3%
56	Cadmium	48	59	57	2	3%
57	Silicon	14	92	89	3	3%
58	Zinc	30	72	70	2	3%
59	Osmium	76	40	39	1	3%
60	Nobelium	102	41	40	1	2%
61	Neptunium	93	42	41	1	2%
62	Nickel	28	85	83	2	2%
63	Seaborgium	106	45	44	1	2%
64	Roentgenium	111	46	45	1	2%
65	Indium	49	50	49	1	2%
66	Radium	88	51	50	1	2%
67	Scandium	21	52	51	1	2%
68	Germanium	32	52	51	1	2%
69	Berkelium	97	53	52	1	2%
70	Barium	56	54	53	1	2%
71	Yttrium	39	55	54	1	2%
72	Krypton	36	56	55	1	2%
73	Lithium	3	228	224	4	2%
74	Cobalt	27	64	63	1	2%
75	Palladium	46	64	63	1	2%
76	Titanium	22	67	66	1	1%
77	Platinum	78	70	69	1	1%
78	Oxygen	8	241	238	3	1%
79	Bromine	35	89	88	1	1%
80	Gold	79	103	103	0	0%
81	Copper	29	93	93	0	0%
82	Aluminum	13	87	87	0	0%
83	Argon	18	82	82	0	0%
84	Chromium	24	74	74	0	0%
85	Iodine	53	70	70	0	0%
86	Tungsten	74	65	65	0	0%
87	Bismuth	83	65	65	0	0%
88	Lead	82	64	64	0	0%
89	Molybdenum	42	63	63	0	0%
90	Vanadium	23	62	62	0	0%
91	Francium	87	57	57	0	0%
92	Selenium	34	56	56	0	0%
93	Uranium	92	56	56	0	0%
94	Zirconium	40	52	52	0	0%
95	Americium	95	50	50	0	0%
96	Hassium	108	50	50	0	0%
97	Tennessine	117	48	48	0	0%
98	Erbium	68	47	47	0	0%
99	Lanthanum	57	46	46	0	0%
100	Dysprosium	66	46	46	0	0%
101	Holmium	67	46	46	0	0%
102	Livermorium	116	46	46	0	0%
103	Xenon	54	45	45	0	0%
104	Cesium	55	45	45	0	0%
105	Iridium	77	45	45	0	0%
106	Polonium	84	45	45	0	0%
107	Cerium	58	44	44	0	0%
108	Hafnium	72	44	44	0	0%
109	Tantalum	73	44	44	0	0%
110	Oganesson	118	44	44	0	0%
111	Actinium	89	43	43	0	0%
112	Europium	63	42	42	0	0%
113	Lutetium	71	42	42	0	0%
114	Meitnerium	109	41	41	0	0%
115	Einsteinium	99	40	40	0	0%
116	Technetium	43	39	39	0	0%
117	Rutherfordium	104	39	39	0	0%
118	Plutonium	94	38	38	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.

No snapshot yet — the first one is coming shortly.

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.

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