Which letter is not used as a symbol of chemical element?

H
I
J
K
H is the chemical symbol of hy­dro­gen, I - iodine, K - potas­si­um.

Answers distribution

H
I
J
K
answers
flagPakistan
0%
4%
95%
0%
23
flagthe Philippines
0%
6%
93%
0%
15
flagSingapore
0%
0%
91%
8%
12
flagIndia
4%
4%
90%
0%
123
flagMalaysia
0%
0%
90%
9%
11
flagUkraine
9%
0%
90%
0%
11
flagItaly
0%
10%
90%
0%
10
flagCanada
0%
0%
89%
5%
19
flagUnknown
4%
12%
80%
2%
215
flagthe United States
5%
6%
79%
5%
235
flagthe United Kingdom
3%
9%
78%
7%
151
flagNorway
16%
8%
75%
0%
12
flagPoland
8%
13%
73%
4%
3756
flagAustralia
7%
0%
71%
7%
14
flagthe Netherlands
5%
17%
58%
17%
17
flagGermany
14%
18%
43%
22%
48

Gender

men75%
women73%
H
6%
9%
I
12%
11%
J
75%
73%
K
4%
5%

Language versions

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answers
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Which letter is not used as a symbol of chemical element?
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